Introduce ViewRoot to forward input/view events to native

content/browser/android/content_view_core_impl.cc

Index: content/browser/android/content_view_core_impl.cc
diff --git a/content/browser/android/content_view_core_impl.cc b/content/browser/android/content_view_core_impl.cc
index 28e8c88b649f24130d2555b0f1143eb6e00da097..0e7e53ecd062f22adeb47802398a9810a556d574 100644
--- a/content/browser/android/content_view_core_impl.cc
+++ b/content/browser/android/content_view_core_impl.cc
@@ -230,12 +230,6 @@ ContentViewCoreImpl::ContentViewCoreImpl(
       dpi_scale_(dpi_scale),
       device_orientation_(0),
       accessibility_enabled_(false) {
-  GetViewAndroid()->SetLayer(cc::Layer::Create());
-  gfx::Size physical_size(
-      Java_ContentViewCore_getPhysicalBackingWidthPix(env, obj),
-      Java_ContentViewCore_getPhysicalBackingHeightPix(env, obj));
-  GetViewAndroid()->GetLayer()->SetBounds(physical_size);
-
   // Currently, the only use case we have for overriding a user agent involves
   // spoofing a desktop Linux user agent for "Request desktop site".
   // Automatically set it for all WebContents so that it is available when a
@@ -735,16 +729,6 @@ gfx::Size ContentViewCoreImpl::GetViewSize() const {
   return size;
 }
 
-gfx::Size ContentViewCoreImpl::GetPhysicalBackingSize() const {
-  JNIEnv* env = AttachCurrentThread();
-  ScopedJavaLocalRef<jobject> j_obj = java_ref_.get(env);
-  if (j_obj.is_null())
-    return gfx::Size();
-  return gfx::Size(
-      Java_ContentViewCore_getPhysicalBackingWidthPix(env, j_obj),
-      Java_ContentViewCore_getPhysicalBackingHeightPix(env, j_obj));
-}
-
 gfx::Size ContentViewCoreImpl::GetViewportSizePix() const {
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jobject> j_obj = java_ref_.get(env);
@@ -1268,11 +1252,6 @@ void ContentViewCoreImpl::RemoveJavascriptInterface(
 
 void ContentViewCoreImpl::WasResized(JNIEnv* env,
                                      const JavaParamRef<jobject>& obj) {
-  gfx::Size physical_size(
-      Java_ContentViewCore_getPhysicalBackingWidthPix(env, obj),
-      Java_ContentViewCore_getPhysicalBackingHeightPix(env, obj));
-  GetViewAndroid()->GetLayer()->SetBounds(physical_size);
-
   SendScreenRectsAndResizeWidget();
 }
 
@@ -1562,6 +1541,7 @@ jlong Init(JNIEnv* env,
       "A ContentViewCoreImpl should be created with a valid WebContents.";
   ui::ViewAndroid* view_android = web_contents->GetView()->GetNativeView();
   view_android->SetDelegate(jview_android_delegate);
+  view_android->SetLayer(cc::Layer::Create());
 
   ui::WindowAndroid* window_android =
         reinterpret_cast<ui::WindowAndroid*>(jwindow_android);