Propagate pageScaleFactor to GuestViews

content/browser/web_contents/web_contents_impl.h

Index: content/browser/web_contents/web_contents_impl.h
diff --git a/content/browser/web_contents/web_contents_impl.h b/content/browser/web_contents/web_contents_impl.h
index 35da9b59954e69259bacf2aa09a8a59c8a5d9a06..af28e0c026d522470c8940bc23eae1391063741d 100644
--- a/content/browser/web_contents/web_contents_impl.h
+++ b/content/browser/web_contents/web_contents_impl.h
@@ -350,7 +350,7 @@ class CONTENT_EXPORT WebContentsImpl
   void ViewFrameSource(const GURL& url, const PageState& page_state) override;
   int GetMinimumZoomPercent() const override;
   int GetMaximumZoomPercent() const override;
-  void ResetPageScale() override;
+  void SetPageScale(float page_scale_factor) override;
   gfx::Size GetPreferredSize() const override;
   bool GotResponseToLockMouseRequest(bool allowed) override;
   bool HasOpener() const override;
@@ -832,6 +832,7 @@ class CONTENT_EXPORT WebContentsImpl
   void OnGoToEntryAtOffset(int offset);
   void OnUpdateZoomLimits(int minimum_percent,
                           int maximum_percent);
+  void OnPageScaleFactorChanged(float page_scale_factor);
   void OnEnumerateDirectory(int request_id, const base::FilePath& path);
 
   void OnRegisterProtocolHandler(const std::string& protocol,
@@ -1312,6 +1313,8 @@ class CONTENT_EXPORT WebContentsImpl
 
   PageImportanceSignals page_importance_signals_;
 
+  bool page_scale_factor_is_one_;
+
   base::WeakPtrFactory<WebContentsImpl> loading_weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsImpl);