Migrate the Android compositor to cc::Layer classes.

content/public/browser/android/content_view_core.h

Index: content/public/browser/android/content_view_core.h
diff --git a/content/public/browser/android/content_view_core.h b/content/public/browser/android/content_view_core.h
index 288cdb578c7edb7b824c5749cf9cd76292411809..7a3c342ea8a500332ebd47abd108f5036d20683e 100644
--- a/content/public/browser/android/content_view_core.h
+++ b/content/public/browser/android/content_view_core.h
@@ -10,6 +10,10 @@
 
 #include "content/public/browser/navigation_controller.h"
 
+namespace cc {
+class Layer;
+}
+
 namespace gfx {
 class Size;
 }
@@ -18,10 +22,6 @@ namespace ui {
 class WindowAndroid;
 }
 
-namespace WebKit {
-class WebLayer;
-}
-
 namespace content {
 class WebContents;
 
@@ -39,7 +39,7 @@ class ContentViewCore {
   virtual base::android::ScopedJavaLocalRef<jobject> GetContainerViewDelegate()
       = 0;
   virtual ui::WindowAndroid* GetWindowAndroid() const = 0;
-  virtual WebKit::WebLayer* GetWebLayer() const = 0;
+  virtual scoped_refptr<cc::Layer> GetLayer() const = 0;
   virtual void LoadUrl(NavigationController::LoadURLParams& params) = 0;
   virtual void OnWebPreferencesUpdated() = 0;
   virtual jint GetCurrentRenderProcessId(JNIEnv* env, jobject obj) = 0;