Move content offset to ViewAndroid

ui/android/view_android.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_ANDROID_VIEW_ANDROID_H_
 #define UI_ANDROID_VIEW_ANDROID_H_
 
 #include <list>
 
 #include "base/android/jni_weak_ref.h"
@@ skipping 42 matching lines @@
     JavaObjectWeakGlobalRef delegate_;
 
     // Default copy/assign disabled by move constructor.
   };
 
   explicit ViewAndroid(ViewClient* client);
 
   ViewAndroid();
   virtual ~ViewAndroid();
 
+  // The content offset is in CSS pixels, and is used to translate
+  // snapshots to the correct part of the view.
+  void set_content_offset(const gfx::Vector2dF& content_offset) {
+    content_offset_ = content_offset;
+  }
+
+  gfx::Vector2dF content_offset() const {
+    return content_offset_;
+  }
+
   // Returns the window at the root of this hierarchy, or |null|
   // if disconnected.
   virtual WindowAndroid* GetWindowAndroid() const;
 
   // Returns |ViewRoot| associated with the current ViewAndroid.
   // Create one if not present.
   base::android::ScopedJavaLocalRef<jobject> GetViewRoot();
 
   // Used to return and set the layer for this view. May be |null|.
   cc::Layer* GetLayer() const;
@@ skipping 46 matching lines @@
   bool HasViewRoot();
 
   std::list<ViewAndroid*> children_;
   scoped_refptr<cc::Layer> layer_;
   JavaObjectWeakGlobalRef delegate_;
   JavaObjectWeakGlobalRef view_root_;
   ViewClient* const client_;
 
   int physical_width_pix_;
   int physical_height_pix_;
+  gfx::Vector2dF content_offset_;  // in CSS pixel
 
   DISALLOW_COPY_AND_ASSIGN(ViewAndroid);
 };
 
 bool RegisterViewRoot(JNIEnv* env);
 
 }  // namespace ui
 
 #endif  // UI_ANDROID_VIEW_ANDROID_H_