Add support for entering/exiting HTML fullscreen from OOPIFs.

third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp

Index: third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp b/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
index cc5d4b7645afc52547288c9a68e05182c15ecad1..6e7254a1f588a2724cf6aa1fa6dd4835bad82779 100644
--- a/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
+++ b/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
@@ -194,6 +194,8 @@ void WebFrameWidgetImpl::resizeVisualViewport(const WebSize& newSize)
     // to use Page messages.  https://crbug.com/599688.
     page()->frameHost().visualViewport().setSize(newSize);
     page()->frameHost().visualViewport().clampToBoundaries();
+
+    view()->didUpdateFullScreenSize();

[alexmos, 2016/05/10 21:36:24]

This is needed for things like opening/resizing a devtools page on the side
while in fullscreen mode.

 }
 
 void WebFrameWidgetImpl::updateMainFrameLayoutSize()
@@ -218,12 +220,12 @@ void WebFrameWidgetImpl::setIgnoreInputEvents(bool newValue)
 
 void WebFrameWidgetImpl::didEnterFullScreen()
 {
-    // FIXME: Implement full screen for out-of-process iframes.
+    view()->didEnterFullScreen();
 }
 
 void WebFrameWidgetImpl::didExitFullScreen()
 {
-    // FIXME: Implement full screen for out-of-process iframes.
+    view()->didExitFullScreen();
 }
 
 void WebFrameWidgetImpl::beginFrame(double lastFrameTimeMonotonic)