CC: Force push properties for all layers when tracing is started

cc/debug/frame_viewer_instrumentation.h

Index: cc/debug/frame_viewer_instrumentation.h
diff --git a/cc/debug/frame_viewer_instrumentation.h b/cc/debug/frame_viewer_instrumentation.h
index 762d058ca5445bf4091d7f3024914e6ab57a0931..37800b8a128b00c0fdb8100b6a00bbd224359bb9 100644
--- a/cc/debug/frame_viewer_instrumentation.h
+++ b/cc/debug/frame_viewer_instrumentation.h
@@ -9,6 +9,9 @@
 #include "cc/resources/tile.h"
 
 namespace cc {
+struct FrameData;
+class LayerTreeHostImpl;
+
 namespace frame_viewer_instrumentation {
 
 class ScopedAnalyzeTask {
@@ -35,6 +38,10 @@ class ScopedRasterTask {
   DISALLOW_COPY_AND_ASSIGN(ScopedRasterTask);
 };
 
+bool IsTracingLayerTreeSnapshots();
+void TraceLayerTreeSnapshot(LayerTreeHostImpl* layer_tree_host_impl,
+                            FrameData* frame);
+
 }  // namespace frame_viewer_instrumentation
 }  // namespace cc