[WK2] Sync call for notifications permissions causes flashes on gmail.com

[WK2] Sync call for notifications permissions causes flashes on gmail.com
https://bugs.webkit.org/show_bug.cgi?id=76570
<rdar://problem/10647155>

Reviewed by Anders Carlsson and Sam Weinig.

Source/WebCore:

* WebCore.exp.in: Export SecurityOrigin::toString().

Add runtime setting to enable/disable notifications.

* page/Settings.cpp:
(WebCore::Settings::Settings):
* page/Settings.h: Add new bit for whether notifications are enabled.
(WebCore::Settings::setNotificationsEnabled):
(WebCore::Settings::notificationsEnabled):

Source/WebKit2:

The website code figures out the permission level for its security origin by making a JS call (called
checkPermission()) that is synchronous. The way this was implemented was to make a synchronous call from
the WebNotificationManager to its proxy. That call goes to the WK API layer to find the policy, and
returns that policy back to the JS.

The synchronous nature of this call causes the white flash to appear in certain cases.

To fix this, the checkPermission() call is handled all within the web process, instead of going up into
the UI process. To do this, the web process initializes the WebNotificationManager with a copy of the
notification permissions. Any time the WK client makes a change to the permissions, that gets sent down
asynchronously, and the cached copy in WebNotificationManager gets updated.

A page's settings may disable notifications altogether. Before, this would have been handled by the WK
client, since retrieving the permissions were also handled there. Now that the lookup happens in the web
process, we need to add that setting in WebCore.

== Update notification permissions to use the security origin's string representation, rather than its
database identifier.

* UIProcess/Notifications/WebNotification.cpp:
(WebKit::WebNotification::WebNotification):
* UIProcess/Notifications/WebNotification.h:
(WebKit::WebNotification::create):
* UIProcess/Notifications/WebNotificationManagerProxy.cpp:
(WebKit::WebNotificationManagerProxy::show): Registering the provider with the manager is handled in
initialize() now.
(WebKit::WebNotificationManagerProxy::cancel): Registering the provider with the manager is handled in
initialize() now.
* UIProcess/Notifications/WebNotificationManagerProxy.h:
* UIProcess/WebPageProxy.cpp:
(WebKit::WebPageProxy::requestNotificationPermission):
(WebKit::WebPageProxy::showNotification):
* UIProcess/WebPageProxy.h:

* WebProcess/Notifications/NotificationPermissionRequestManager.cpp:
(WebKit::NotificationPermissionRequestManager::startRequest): Only start the request if notifications
are enabled.
* WebProcess/Notifications/WebNotificationManager.cpp:
(WebKit::WebNotificationManager::show): Only show notification is they are enabled.
(WebKit::WebNotificationManager::cancel): Only cancel if notifications are enabled.

== Remove synchronous message to get policy for a given origin. Instead, use the cached copy in
WebNotificationManager.

* WebProcess/Notifications/WebNotificationManager.h:
* WebProcess/Notifications/WebNotificationManager.cpp:
(WebKit::WebNotificationManager::policyForOrigin): Looks for the permission in the cached copy.
If it doesn't exist, return NotificationPresenter::PermissionNotAllowed.
* WebProcess/Notifications/NotificationPermissionRequestManager.cpp:
(WebKit::NotificationPermissionRequestManager::permissionLevel): Update permissionLevel to use
policyForOrigin().

Remove old WK API function to get the policy. Because this function was the only synchronous message,
we remove the sync-message-related functions also. Also, add in some #includes that might have been
omitted in prior patches.

* UIProcess/API/C/WKNotificationProvider.h:
* UIProcess/Notifications/WebNotificationManagerProxy.messages.in: Remove NotificationPermissionLevel.
* UIProcess/Notifications/WebNotificationManagerProxy.h:
* UIProcess/Notifications/WebNotificationManagerProxy.cpp:

* UIProcess/Notifications/WebNotificationProvider.h: Remove policyForNotificationPermissionAtOrigin().
* UIProcess/Notifications/WebNotificationProvider.cpp:

* UIProcess/WebProcessProxy.cpp:
(WebKit::WebProcessProxy::didReceiveSyncMessage): Remove conditional to forward sync messages to the
notification manager proxy.

== Mechanism for client to update the permissions copy in WebNotificationManager.

* WebProcess/Notifications/WebNotificationManager.messages.in: Add new messages
didUpdateNotificationDecision and didRemoveNotificationDecisions.
* WebProcess/Notifications/WebNotificationManager.h:
* WebProcess/Notifications/WebNotificationManager.cpp:
(WebKit::WebNotificationManager::initialize):
(WebKit::WebNotificationManager::didUpdateNotificationDecision): Update the entry.
(WebKit::WebNotificationManager::didRemoveNotificationDecisions): Remove the entry.

* UIProcess/Notifications/WebNotificationManagerProxy.h:
* UIProcess/Notifications/WebNotificationManagerProxy.cpp:
(WebKit::WebNotificationManagerProxy::providerDidUpdateNotificationPolicy):
(WebKit::WebNotificationManagerProxy::providerDidRemoveNotificationPolicies): Convert the array of
origins to remove, and send it to the WebNotificationManager.

* UIProcess/API/C/WKNotificationManager.h: Expose these update functions as WK API.
* UIProcess/API/C/WKNotificationManager.cpp:
(WKNotificationManagerProviderDidUpdateNotificationPolicy):
(WKNotificationManagerProviderDidRemoveNotificationPolicies):

== Initialize WebNotificationManager with permissions. Initialize WebPage with notifications enabled bit
from settings.

* Shared/WebProcessCreationParameters.h: Add map of notification permissions as part of the
parameters.
* Shared/WebProcessCreationParameters.cpp:
(WebKit::WebProcessCreationParameters::encode):
(WebKit::WebProcessCreationParameters::decode):

* UIProcess/Notifications/WebNotificationProvider.h: Retrieve copy of existing notification permissions.
* UIProcess/Notifications/WebNotificationProvider.cpp:
* UIProcess/API/C/WKNotificationProvider.h: Add WK API to get a copy of the permissions.

* UIProcess/Notifications/WebNotificationManagerProxy.h: Add populateCopyOfNotificationPermissions().
* UIProcess/Notifications/WebNotificationManagerProxy.cpp:
(WebKit::WebNotificationManagerProxy::initializeProvider): Add the manager at the time of initialization.
Similar calls in show() and cancel() are removed in following patch.
(WebKit::WebNotificationManagerProxy::populateCopyOfNotificationPermissions): Clear the existing copy.
Populate with origin string, and whether that origin is allowed to post. If no decision has been made
by the user, then there should be no item in this dictionary.

* UIProcess/WebContext.cpp:
(WebKit::WebContext::ensureWebProcess): When the web process is initialized, we get a copy of the
permissions, and send it to the web process to initialize the notification manager.
* WebProcess/mac/WebProcessMac.mm:
(WebKit::WebProcess::platformInitializeWebProcess): Initialize the notification manager.

* WebProcess/Notifications/WebNotificationManager.h:
* WebProcess/Notifications/WebNotificationManager.cpp:
(WebKit::WebNotificationManager::initialize): Initialize the permissions copy.

* WebProcess/WebPage/WebPage.cpp:
(WebKit::WebPage::updatePreferences): Set notifications enabled bit from settings.

== Expose toString() method from WebCore::SecurityOrigin. Work is also towards bug 74956.

* Shared/API/c/WKSecurityOrigin.h: Refactor WKSecurityOriginCreateFromIdentifier to
WKSecurityOriginCreateFromDatabaseIdentifier and add WKSecurityOriginCreateFromString function.
* Shared/API/c/WKSecurityOrigin.cpp:
(WKSecurityOriginCreateFromString):
(WKSecurityOriginCreateFromDatabaseIdentifier):
(WKSecurityOriginCopyToString):

Refactor WebSecurityOrigin::create() to WebSecurityOrigin::createFromDatabaseIdentifier()
and add WebSecurityOrigin::createFromString().

* Shared/WebSecurityOrigin.h:
(WebKit::WebSecurityOrigin::createFromString):
(WebKit::WebSecurityOrigin::createFromDatabaseIdentifier):
(WebKit::WebSecurityOrigin::toString): Added function.

Refactor with renamed createFromDatabaseIdentifier() method.

* UIProcess/WebDatabaseManagerProxy.cpp:
(WebKit::WebDatabaseManagerProxy::didGetDatabasesByOrigin):
(WebKit::WebDatabaseManagerProxy::didGetDatabaseOrigins):
(WebKit::WebDatabaseManagerProxy::didModifyOrigin):
(WebKit::WebDatabaseManagerProxy::didModifyDatabase):
* UIProcess/WebPageProxy.cpp:
(WebKit::WebPageProxy::exceededDatabaseQuota):
(WebKit::WebPageProxy::requestGeolocationPermissionForFrame):

== Add WK API calls to change notificationsEnabled bit in WebCore::Settings.

* Shared/WebPreferencesStore.h:
* UIProcess/API/C/WKPreferences.cpp:
(WKPreferencesSetNotificationsEnabled):
(WKPreferencesGetNotificationsEnabled):
* UIProcess/API/C/WKPreferences.h:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@105364 268f45cc-cd09-0410-ab3c-d52691b4dbfc