cc: Clear the invalidation history when moving between compositors.

cc/resources/display_list_recording_source.cc

Index: cc/resources/display_list_recording_source.cc
diff --git a/cc/resources/display_list_recording_source.cc b/cc/resources/display_list_recording_source.cc
index 517f49faf0c56f81ff3918fea63f6d988db9b923..8d2dc3ec9ee0c0e6a56c47407df708e9618a8313 100644
--- a/cc/resources/display_list_recording_source.cc
+++ b/cc/resources/display_list_recording_source.cc
@@ -115,6 +115,10 @@ bool DisplayListRecordingSource::UpdateAndExpandInvalidation(
   return true;
 }
 
+void DisplayListRecordingSource::DidMoveToNewCompositor() {
+  // No invalidation history to worry about here.
+}
+
 gfx::Size DisplayListRecordingSource::GetSize() const {
   return size_;
 }