cc: Make gpu rasterization flag per page instead of per layer.

BUG=367198

Review URL: https://codereview.chromium.org/265823003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@268320 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/cc/layers/layer.h b/cc/layers/layer.h
index 5e4a4018..7e7d2861 100644
--- a/cc/layers/layer.h
+++ b/cc/layers/layer.h
@@ -363,6 +363,7 @@
   virtual void SetIsMask(bool is_mask) {}
   virtual void ReduceMemoryUsage() {}
   virtual void OnOutputSurfaceCreated() {}
+  virtual bool IsSuitableForGpuRasterization() const;
 
   virtual scoped_refptr<base::debug::ConvertableToTraceFormat> TakeDebugInfo();