[blink] Support (semi-)transparent background colors in WebView/Frame.

third_party/WebKit/Source/web/FullscreenController.h

Index: third_party/WebKit/Source/web/FullscreenController.h
diff --git a/third_party/WebKit/Source/web/FullscreenController.h b/third_party/WebKit/Source/web/FullscreenController.h
index a4bd8d9658075300ab1fa6524cc35c06df25b385..7bf8df37d6a1e7168be627de22c5792e9472dbdc 100644
--- a/third_party/WebKit/Source/web/FullscreenController.h
+++ b/third_party/WebKit/Source/web/FullscreenController.h
@@ -31,9 +31,10 @@
 #ifndef FullscreenController_h
 #define FullscreenController_h
 
+#include <memory>
 #include "platform/geometry/FloatPoint.h"

[lfg, 2017/03/23 16:05:21]

nit: one line spacing after <memory>, according to
https://chromium.googlesource.com/chromium/src/+/master/styleguide/c++/c++.md

[Eric Seckler, 2017/03/23 16:34:48]

Done.

 #include "platform/geometry/IntSize.h"
-#include <memory>
+#include "platform/graphics/Color.h"
 
 namespace blink {
 
@@ -71,6 +72,7 @@ class FullscreenController {
 
  private:
   void updatePageScaleConstraints(bool removeConstraints);
+  void restoreBackgroundColorOverride();
 
   WebViewImpl* m_webViewImpl;
 
@@ -94,6 +96,8 @@ class FullscreenController {
   float m_initialPageScaleFactor = 0.0f;
   IntSize m_initialScrollOffset;
   FloatPoint m_initialVisualViewportOffset;
+  bool m_initialBackgroundColorOverrideEnabled = false;
+  RGBA32 m_initialBackgroundColorOverride = Color::transparent;
 };
 
 }  // namespace blink