[Master/Overview CL] Make PageScaleFactor work for oopif subframe.

content/browser/renderer_host/render_widget_host_delegate.h

Index: content/browser/renderer_host/render_widget_host_delegate.h
diff --git a/content/browser/renderer_host/render_widget_host_delegate.h b/content/browser/renderer_host/render_widget_host_delegate.h
index 6948db4991a46e1b9a1f312a5bdc7f1f9a3e2079..db1b555635f2164693e15aea6670d48cff35920d 100644
--- a/content/browser/renderer_host/render_widget_host_delegate.h
+++ b/content/browser/renderer_host/render_widget_host_delegate.h
@@ -66,6 +66,10 @@ class CONTENT_EXPORT RenderWidgetHostDelegate {
   // Sets the device scale factor for frames associated with this WebContents.
   virtual void UpdateDeviceScaleFactor(double device_scale_factor) {}
 
+  // Sets the device scale factor for cross-process subframes associated with
+  // this WebContents.
+  virtual void SetPageScaleFactorForSubframes(double page_scale_factor) {}
+
   // Retrieve screen information.
   virtual void GetScreenInfo(ScreenInfo* web_screen_info);