Web Inspector: Implement screen resolution emulation backend

Web Inspector: Implement screen resolution emulation backend
https://bugs.webkit.org/show_bug.cgi?id=76532

Reviewed by Pavel Feldman.

Source/WebCore:

The emulation affects [min-|max-]device-(width|height) media queries, window.screen.(width|height),
and window.inner(Width|Height).

Test: inspector/styles/override-screen-size.html

* css/MediaQueryEvaluator.cpp:
(WebCore::device_heightMediaFeatureEval): Apply device-height override if necessary.
(WebCore::device_widthMediaFeatureEval): Apply device-width override if necessary.
* inspector/Inspector.json:
* inspector/InspectorCSSAgent.cpp:
(WebCore::InspectorCSSAgent::InspectorCSSAgent):
(WebCore::InspectorCSSAgent::startSelectorProfiler):
(WebCore::InspectorCSSAgent::stopSelectorProfilerImpl):
(WebCore::InspectorCSSAgent::willMatchRule):
(WebCore::InspectorCSSAgent::didMatchRule):
(WebCore::InspectorCSSAgent::willProcessRule):
(WebCore::InspectorCSSAgent::didProcessRule):
* inspector/InspectorInstrumentation.cpp:
(WebCore::InspectorInstrumentation::applyScreenWidthOverrideImpl):
(WebCore::InspectorInstrumentation::applyScreenHeightOverrideImpl):
* inspector/InspectorInstrumentation.h:
(WebCore::InspectorInstrumentation::applyScreenWidthOverride):
(WebCore::InspectorInstrumentation::applyScreenHeightOverride):
* inspector/InspectorPageAgent.cpp:
(WebCore::InspectorPageAgent::InspectorPageAgent):
(WebCore::InspectorPageAgent::restore):
(WebCore::InspectorPageAgent::disable):
(WebCore::InspectorPageAgent::setScreenSizeOverride):
(WebCore::InspectorPageAgent::applyScreenWidthOverride):
(WebCore::InspectorPageAgent::applyScreenHeightOverride):
(WebCore::InspectorPageAgent::updateFrameViewFixedLayout):
(WebCore::InspectorPageAgent::clearFrameViewFixedLayout):
(WebCore::InspectorPageAgent::setFrameViewFixedLayout):
* inspector/InspectorPageAgent.h:
* page/DOMWindow.cpp:
(WebCore::DOMWindow::innerHeight): Apply height override if necessary.
(WebCore::DOMWindow::innerWidth): Apply width override if necessary.
* page/Screen.cpp:
(WebCore::Screen::height): Apply height override if necessary.
(WebCore::Screen::width): Apply width override if necessary.

LayoutTests:

* inspector/styles/override-screen-size-expected.txt: Added.
* inspector/styles/override-screen-size.html: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@105415 268f45cc-cd09-0410-ab3c-d52691b4dbfc