Turn off computation of the interest rect in cc in synchronized paint mode.

cc/test/solid_color_content_layer_client.cc

Index: cc/test/solid_color_content_layer_client.cc
diff --git a/cc/test/solid_color_content_layer_client.cc b/cc/test/solid_color_content_layer_client.cc
index 495e06994b1af8d58008f9006460f6405ef21dbd..97642dd63fca3f2cbdaaf024668c83d41e4a31e1 100644
--- a/cc/test/solid_color_content_layer_client.cc
+++ b/cc/test/solid_color_content_layer_client.cc
@@ -15,6 +15,10 @@
 
 namespace cc {
 
+gfx::Rect SolidColorContentLayerClient::PaintableRegion() {
+  return gfx::Rect(size_);
+}
+
 scoped_refptr<DisplayItemList>
 SolidColorContentLayerClient::PaintContentsToDisplayList(
     const gfx::Rect& clip,