cc: Add frame timing request plumbing through the layers.

cc/layers/layer_impl.cc

Index: cc/layers/layer_impl.cc
diff --git a/cc/layers/layer_impl.cc b/cc/layers/layer_impl.cc
index 8c7d9729c4f4182acfee3e4f8c6fa5cab7905e7f..f0e47e896a58c2a8d5c70cabe46968e41f9e55e8 100644
--- a/cc/layers/layer_impl.cc
+++ b/cc/layers/layer_impl.cc
@@ -71,7 +71,8 @@ LayerImpl::LayerImpl(LayerTreeImpl* tree_impl, int id)
       needs_push_properties_(false),
       num_dependents_need_push_properties_(0),
       sorting_context_id_(0),
-      current_draw_mode_(DRAW_MODE_NONE) {
+      current_draw_mode_(DRAW_MODE_NONE),
+      frame_timing_requests_dirty_(false) {
   DCHECK_GT(layer_id_, 0);
   DCHECK(layer_tree_impl_);
   layer_tree_impl_->RegisterLayer(this);
@@ -613,6 +614,11 @@ void LayerImpl::PushPropertiesTo(LayerImpl* layer) {
   layer->SetStackingOrderChanged(stacking_order_changed_);
   layer->SetDebugInfo(debug_info_);
 
+  if (frame_timing_requests_dirty_) {
+    layer->SetFrameTimingRequests(frame_timing_requests_);
+    frame_timing_requests_dirty_ = false;
+  }
+
   // Reset any state that should be cleared for the next update.
   stacking_order_changed_ = false;
   update_rect_ = gfx::Rect();
@@ -1577,6 +1583,19 @@ void LayerImpl::AsValueInto(base::debug::TracedValue* state) const {
       NOTREACHED();
     }
   }
+
+  if (!frame_timing_requests_.empty()) {
+    state->BeginArray("frame_timing_requests");
+    for (const auto& request : frame_timing_requests_) {
+      state->BeginDictionary();
+      state->SetInteger("request_id", request.id());
+      state->BeginArray("request_rect");
+      MathUtil::AddToTracedValue(request.rect(), state);
+      state->EndArray();
+      state->EndDictionary();
+    }
+    state->EndArray();
+  }
 }
 
 bool LayerImpl::IsDrawnRenderSurfaceLayerListMember() const {
@@ -1615,4 +1634,11 @@ void LayerImpl::SetHasRenderSurface(bool should_have_render_surface) {
   render_surface_.reset();
 }
 
+void LayerImpl::SetFrameTimingRequests(

[danakj, 2015/01/23 18:08:45]

same order as in the header please

[vmpstr, 2015/01/23 18:41:57]

Done.

+    const std::vector<FrameTimingRequest>& requests) {
+  frame_timing_requests_ = requests;
+  frame_timing_requests_dirty_ = true;
+  SetNeedsPushProperties();
+}
+
 }  // namespace cc