cc : Make CallFunctionForSubtree on impl use layer iterator

cc/debug/debug_rect_history.cc

Index: cc/debug/debug_rect_history.cc
diff --git a/cc/debug/debug_rect_history.cc b/cc/debug/debug_rect_history.cc
index cc8d12363b1d339afe60882cfe9ca96e20768429..16eb5cf4bab04d668d65fc1415c9962f51c019e7 100644
--- a/cc/debug/debug_rect_history.cc
+++ b/cc/debug/debug_rect_history.cc
@@ -158,9 +158,9 @@ void DebugRectHistory::SaveScreenSpaceRects(
 }
 
 void DebugRectHistory::SaveTouchEventHandlerRects(LayerImpl* layer) {
-  LayerTreeHostCommon::CallFunctionForSubtree(layer, [this](LayerImpl* layer) {
-    SaveTouchEventHandlerRectsCallback(layer);
-  });
+  LayerTreeHostCommon::CallFunctionForEveryLayer(
+      layer,
+      [this](LayerImpl* layer) { SaveTouchEventHandlerRectsCallback(layer); });
 }
 
 void DebugRectHistory::SaveTouchEventHandlerRectsCallback(LayerImpl* layer) {
@@ -197,9 +197,9 @@ void DebugRectHistory::SaveWheelEventHandlerRects(LayerImpl* root_layer) {
 }
 
 void DebugRectHistory::SaveScrollEventHandlerRects(LayerImpl* layer) {
-  LayerTreeHostCommon::CallFunctionForSubtree(layer, [this](LayerImpl* layer) {
-    SaveScrollEventHandlerRectsCallback(layer);
-  });
+  LayerTreeHostCommon::CallFunctionForEveryLayer(
+      layer,
+      [this](LayerImpl* layer) { SaveScrollEventHandlerRectsCallback(layer); });
 }
 
 void DebugRectHistory::SaveScrollEventHandlerRectsCallback(LayerImpl* layer) {
@@ -213,9 +213,9 @@ void DebugRectHistory::SaveScrollEventHandlerRectsCallback(LayerImpl* layer) {
 }
 
 void DebugRectHistory::SaveNonFastScrollableRects(LayerImpl* layer) {
-  LayerTreeHostCommon::CallFunctionForSubtree(layer, [this](LayerImpl* layer) {
-    SaveNonFastScrollableRectsCallback(layer);
-  });
+  LayerTreeHostCommon::CallFunctionForEveryLayer(
+      layer,
+      [this](LayerImpl* layer) { SaveNonFastScrollableRectsCallback(layer); });
 }
 
 void DebugRectHistory::SaveNonFastScrollableRectsCallback(LayerImpl* layer) {