Add GetScrollOffset function to PPB_View

ppapi/shared_impl/ppb_view_shared.h

Index: ppapi/shared_impl/ppb_view_shared.h
diff --git a/ppapi/shared_impl/ppb_view_shared.h b/ppapi/shared_impl/ppb_view_shared.h
index 2ee226d31ecf5fea15ce3cc8d542a61c1a53bbf5..b98306959d59126609f70ef7feab6539477b40e2 100644
--- a/ppapi/shared_impl/ppb_view_shared.h
+++ b/ppapi/shared_impl/ppb_view_shared.h
@@ -27,6 +27,7 @@ struct PPAPI_SHARED_EXPORT ViewData {
   PP_Rect clip_rect;
   float device_scale;
   float css_scale;
+  PP_Point scroll_offset;
 };
 
 class PPAPI_SHARED_EXPORT PPB_View_Shared : public Resource,
@@ -49,6 +50,7 @@ class PPAPI_SHARED_EXPORT PPB_View_Shared : public Resource,
   virtual PP_Bool GetClipRect(PP_Rect* clip) const OVERRIDE;
   virtual float GetDeviceScale() const OVERRIDE;
   virtual float GetCSSScale() const OVERRIDE;
+  virtual PP_Bool GetScrollOffset(PP_Point* scroll_offset) const OVERRIDE;
 
  private:
   ViewData data_;