Web Inspector: [Device Metrics] Remove the gutter overlay moving its functionality into the InspectorOverlay
https://bugs.webkit.org/show_bug.cgi?id=97799

Reviewed by Pavel Feldman.

Source/WebCore:

Re-applying r129746 with test flakiness fixed.

In order to reduce the amount of port-specific code, the gutter overlay painted in the device metrics emulation mode
has been replaced by the respective functionality in the HTML-based InspectorOverlay in WebCore. The InspectorOverlay
now covers the entire WebView rather than the FrameView only.

* inspector/InspectorController.cpp:
(WebCore::InspectorController::webViewResized):
(WebCore):
* inspector/InspectorController.h:
(WebCore):
(InspectorController):
* inspector/InspectorOverlay.cpp:
(WebCore::InspectorOverlay::InspectorOverlay):
(WebCore::InspectorOverlay::paint):
(WebCore::InspectorOverlay::resize):
(WebCore):
(WebCore::InspectorOverlay::update):
(WebCore::InspectorOverlay::drawGutter):
(WebCore::InspectorOverlay::reset):
* inspector/InspectorOverlay.h:
(InspectorOverlay):
* inspector/InspectorOverlayPage.html: Introduce the gutter painting functionality previously found in the Chromium's
DeviceMetricsSupport class, which used to implement WebPageOverlay.

Source/WebKit/chromium:

- Dispatch the webViewResized() event on InspectorController, which is necessary to update the InspectorOverlay.
- Remove the gutter overlay painting code.

* src/WebDevToolsAgentImpl.cpp:
(WebKit::DeviceMetricsSupport::DeviceMetricsSupport):
(WebKit::DeviceMetricsSupport::~DeviceMetricsSupport):
(WebKit::WebDevToolsAgentImpl::attach):
(WebKit::WebDevToolsAgentImpl::webViewResized):
(WebKit::WebDevToolsAgentImpl::overrideDeviceMetrics):
* src/WebDevToolsAgentImpl.h:
(WebDevToolsAgentImpl):
* src/WebDevToolsAgentPrivate.h:
(WebDevToolsAgentPrivate):
* src/WebViewImpl.cpp:
(WebKit::WebViewImpl::resize):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@130015 268f45cc-cd09-0410-ab3c-d52691b4dbfc