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

cc/test/fake_display_list_recording_source.cc

Index: cc/test/fake_display_list_recording_source.cc
diff --git a/cc/test/fake_display_list_recording_source.cc b/cc/test/fake_display_list_recording_source.cc
index 9f792c74ed4236bd80ff1212068f9ade40076e68..c48859efd455c5756c5664e3cf7d4ac19408cee4 100644
--- a/cc/test/fake_display_list_recording_source.cc
+++ b/cc/test/fake_display_list_recording_source.cc
@@ -8,6 +8,10 @@
 
 namespace cc {
 
+FakeDisplayListRecordingSource::FakeDisplayListRecordingSource()
+    : force_unsuitable_for_gpu_rasterization_(false),
+      playback_allowed_event_(nullptr) {}
+
 bool FakeDisplayListRecordingSource::IsSuitableForGpuRasterization() const {
   if (force_unsuitable_for_gpu_rasterization_)
     return false;