Added preliminary support for tile rasterization with Ganesh

cc/resources/resource_provider.h

Index: cc/resources/resource_provider.h
diff --git a/cc/resources/resource_provider.h b/cc/resources/resource_provider.h
index 6cd4270fe0840e3cead3f17fdde266255dbc8fa8..761297404a022ae7f0b554639b07b4995f9c97c9 100644
--- a/cc/resources/resource_provider.h
+++ b/cc/resources/resource_provider.h
@@ -246,11 +246,13 @@ class CC_EXPORT ResourceProvider {
     ~ScopedWriteLockGL();
 
     unsigned texture_id() const { return texture_id_; }
+    ResourceFormat format() const { return format_; }
 
    private:
     ResourceProvider* resource_provider_;
     ResourceProvider::ResourceId resource_id_;
     unsigned texture_id_;
+    ResourceFormat format_;
 
     DISALLOW_COPY_AND_ASSIGN(ScopedWriteLockGL);
   };