Implement SetVisuallyDeemphasized in ChromeRenderViewObserver.

Implement SetVisuallyDeemphasized in ChromeRenderViewObserver
- Add a ChromeViewMsg_SetVisuallyDeemphasized and use it to toggle background dimming on web contents via ChromeRenderViewObserver;
- Derive WebViewColorOverlay from WebKit::WebPageOverlay and add to web view when need to dimming the background;
- Remove RWHV SetVisuallyDeemphasized since it's no longer used;

BUG=103386
TEST=Verify fix for 103386, dimming should show up even when accelerated compositing is on.


Review URL: http://codereview.chromium.org/8730001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@112787 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 6 insertions, 0 deletions

diff --git a/chrome/renderer/chrome_render_view_observer.h b/chrome/renderer/chrome_render_view_observer.h
index 4f995b1..bbaa13e 100644
--- a/chrome/renderer/chrome_render_view_observer.h
+++ b/chrome/renderer/chrome_render_view_observer.h
@@ -25,10 +25,12 @@ class ExternalHostBindings;
 class SkBitmap;
 class TranslateHelper;
 struct ThumbnailScore;
+class WebViewColorOverlay;
 
 namespace WebKit {
 class WebView;
 }
+
 namespace safe_browsing {
 class PhishingClassifierDelegate;
 }
@@ -127,6 +129,7 @@ class ChromeRenderViewObserver : public content::RenderViewObserver,
   void OnSetAllowDisplayingInsecureContent(bool allow);
   void OnSetAllowRunningInsecureContent(bool allow);
   void OnSetClientSidePhishingDetection(bool enable_phishing_detection);
+  void OnSetVisuallyDeemphasized(bool deemphasized);
   void OnStartFrameSniffer(const string16& frame_name);
   void OnGetFPS();
   void OnAddStrictSecurityHost(const std::string& host);
@@ -220,6 +223,9 @@ class ChromeRenderViewObserver : public content::RenderViewObserver,
   // ImageResourceFetchers schedule via DownloadImage.
   ImageResourceFetcherList image_fetchers_;
 
+  // A color page overlay when visually de-emaphasized.
+  scoped_ptr<WebViewColorOverlay> dimmed_color_overlay_;
+
   DISALLOW_COPY_AND_ASSIGN(ChromeRenderViewObserver);
 };