Don't hardcode target dpi of 160 (it should be 96 on desktop)

Don't hardcode target dpi of 160 (it should be 96 on desktop)
https://bugs.webkit.org/show_bug.cgi?id=88114

Patch by Konrad Piascik <kpiascik@rim.com> on 2012-06-29
Reviewed by Adam Barth.

Source/WebCore:

No behavioural change, current tests in fast/viewport cover all
functionality.

* WebCore.exp.in: Updated symbol for computeViewportAttributes.
* dom/ViewportArguments.cpp: Use new parameter for devicePixelRatio
                             and don't calculate it anymore.
(WebCore::computeViewportAttributes):
* dom/ViewportArguments.h: Change the deviceDPI parameter to
                           devicePixelRatio and put the onus
                           on the embedder to supply the
                           correct value.  Add temporary constant.
(WebCore):

Source/WebKit/blackberry:

Added new WebSetting to specify what the devicePixelRatio should be.
Updated the call to computeViewportAttributes.

* Api/WebPage.cpp:
(BlackBerry::WebKit::WebPagePrivate::recomputeVirtualViewportFromViewportArguments):
* Api/WebSettings.cpp:
(WebKit):
(BlackBerry::WebKit::WebSettings::standardSettings):
(BlackBerry::WebKit::WebSettings::devicePixelRatio):
(BlackBerry::WebKit::WebSettings::setDevicePixelRatio):
* Api/WebSettings.h:
* WebKitSupport/DumpRenderTreeSupport.cpp:
(DumpRenderTreeSupport::dumpConfigurationForViewport):

Source/WebKit/chromium:

Updated the call to computeViewportAttributes.

* src/ChromeClientImpl.cpp:
(WebKit::ChromeClientImpl::dispatchViewportPropertiesDidChange):

Source/WebKit/efl:

Updated the call to computeViewportAttributes.

* WebCoreSupport/DumpRenderTreeSupportEfl.cpp:
(DumpRenderTreeSupportEfl::dumpConfigurationForViewport):
* ewk/ewk_view.cpp:
(_ewk_view_viewport_attributes_compute):

Source/WebKit/gtk:

Updated the call to computeViewportAttributes.

* WebCoreSupport/DumpRenderTreeSupportGtk.cpp:
(DumpRenderTreeSupportGtk::dumpConfigurationForViewport):
* webkit/webkitviewportattributes.cpp:
(webkitViewportAttributesRecompute):

Source/WebKit/qt:

Updated the call to computeViewportAttributes.

* Api/qwebpage.cpp:
(QWebPage::viewportAttributesForSize):
* WebCoreSupport/DumpRenderTreeSupportQt.cpp:
(DumpRenderTreeSupportQt::viewportAsText):

Source/WebKit2:

Updated the call to computeViewportAttributes.

* WebProcess/WebPage/WebPage.cpp:
(WebKit::WebPage::sendViewportAttributesChanged):
(WebKit::WebPage::viewportConfigurationAsText):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@121555 268f45cc-cd09-0410-ab3c-d52691b4dbfc