Update IOSurface scale factor before compare

content/browser/renderer_host/compositing_iosurface_mac.h

Index: content/browser/renderer_host/compositing_iosurface_mac.h
diff --git a/content/browser/renderer_host/compositing_iosurface_mac.h b/content/browser/renderer_host/compositing_iosurface_mac.h
index b6f734be629d55dc4f42fedd63cf008bd16a52fd..1ca402d66a41cfabed45bf484e3b1c72d5a61d18 100644
--- a/content/browser/renderer_host/compositing_iosurface_mac.h
+++ b/content/browser/renderer_host/compositing_iosurface_mac.h
@@ -114,6 +114,8 @@ class CompositingIOSurfaceMac {
   // In cocoa view units / DIPs.
   const gfx::Size& io_surface_size() const { return io_surface_size_; }
 
+  void SetDeviceScaleFactor(float scale_factor);
+
   bool is_vsync_disabled() const;
 
   // Get vsync scheduling parameters.
@@ -333,8 +335,6 @@ class CompositingIOSurfaceMac {
   // Timer for finishing a copy operation.
   base::Timer finish_copy_timer_;
 
-  SurfaceQuad quad_;
-
   // CVDisplayLink for querying Vsync timing info and throttling swaps.
   CVDisplayLinkRef display_link_;