cc: Add main frame timing info to frame timing tracker.

cc/trees/layer_tree_impl.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/trees/layer_tree_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <set>
 
@@ skipping 16 matching lines @@
 #include "cc/layers/scrollbar_layer_impl_base.h"
 #include "cc/resources/ui_resource_request.h"
 #include "cc/trees/layer_tree_host_common.h"
 #include "cc/trees/layer_tree_host_impl.h"
 #include "cc/trees/occlusion_tracker.h"
 #include "ui/gfx/geometry/point_conversions.h"
 #include "ui/gfx/geometry/size_conversions.h"
 #include "ui/gfx/geometry/vector2d_conversions.h"
 
 namespace cc {
+namespace {
+
+template <typename Lambda>
+void ProcessLayersRecursive(LayerImpl* current, const Lambda& lambda) {
+  DCHECK(current);
+  lambda(current);
+  if (current->mask_layer())
+    ProcessLayersRecursive(current->mask_layer(), lambda);
+  if (current->replica_layer())
+    ProcessLayersRecursive(current->replica_layer(), lambda);
+  for (size_t i = 0; i < current->children().size(); ++i)
+    ProcessLayersRecursive(current->children()[i], lambda);
+}
+
+}  // namespace
 
 // This class exists to split the LayerScrollOffsetDelegate between the
 // InnerViewportScrollLayer and the OuterViewportScrollLayer in a manner
 // that never requires the embedder or LayerImpl to know about.
 class LayerScrollOffsetDelegateProxy : public LayerImpl::ScrollOffsetDelegate {
  public:
   LayerScrollOffsetDelegateProxy(LayerImpl* layer,
                                  LayerScrollOffsetDelegate* delegate,
                                  LayerTreeImpl* layer_tree)
       : layer_(layer), delegate_(delegate), layer_tree_impl_(layer_tree) {}
@@ skipping 67 matching lines @@
   // the LayerTreeImpl pointer is still valid in the LayerImpl dtor.
   DCHECK(!root_layer_);
   DCHECK(layers_with_copy_output_request_.empty());
 }
 
 void LayerTreeImpl::Shutdown() {
   root_layer_ = nullptr;
 }
 
 void LayerTreeImpl::ReleaseResources() {
-  if (root_layer_)
-    ProcessLayersRecursive(root_layer_.get(), &LayerImpl::ReleaseResources);
+  if (!root_layer_)
+    return;
+
+  ProcessLayersRecursive(root_layer_.get(),
+                         [](LayerImpl* layer) { layer->ReleaseResources(); });
 }
 
 void LayerTreeImpl::RecreateResources() {
-  if (root_layer_)
-    ProcessLayersRecursive(root_layer_.get(), &LayerImpl::RecreateResources);
+  if (!root_layer_)
+    return;
+
+  ProcessLayersRecursive(root_layer_.get(),
+                         [](LayerImpl* layer) { layer->RecreateResources(); });
+}
+
+void LayerTreeImpl::GatherFrameTimingRequestIds(
+    std::vector<int64_t>* request_ids) {
+  if (!root_layer_)
+    return;
+
+  // TODO(vmpstr): Early out if there are no requests on any of the layers. For
+  // that, we need to inform LayerTreeImpl whenever there are requests when we
+  // get them.

[vmpstr, 2015/02/11 22:42:49]

Alternatively, I can store requests ids on layer_tree_impl() keyed by layer_id.
Would that be better?

+  ProcessLayersRecursive(root_layer_.get(), [&request_ids](LayerImpl* layer) {
+    layer->GatherFrameTimingRequestIds(request_ids);
+  });
 }
 
 void LayerTreeImpl::SetRootLayer(scoped_ptr<LayerImpl> layer) {
   if (inner_viewport_scroll_layer_)
     inner_viewport_scroll_layer_->SetScrollOffsetDelegate(NULL);
   if (outer_viewport_scroll_layer_)
     outer_viewport_scroll_layer_->SetScrollOffsetDelegate(NULL);
   inner_viewport_scroll_delegate_proxy_ = nullptr;
   outer_viewport_scroll_delegate_proxy_ = nullptr;
 
@@ skipping 1058 matching lines @@
 
 const std::vector<LayerImpl*>& LayerTreeImpl::LayersWithCopyOutputRequest()
     const {
   // Only the active tree needs to know about layers with copy requests, as
   // they are aborted if not serviced during draw.
   DCHECK(IsActiveTree());
 
   return layers_with_copy_output_request_;
 }
 
-void LayerTreeImpl::ProcessLayersRecursive(LayerImpl* current,
-                                           void (LayerImpl::*function)()) {
-  DCHECK(current);
-  (current->*function)();
-  if (current->mask_layer())
-    ProcessLayersRecursive(current->mask_layer(), function);
-  if (current->replica_layer())
-    ProcessLayersRecursive(current->replica_layer(), function);
-  for (size_t i = 0; i < current->children().size(); ++i)
-    ProcessLayersRecursive(current->children()[i], function);
-}
-
 template <typename LayerType>
 static inline bool LayerClipsSubtree(LayerType* layer) {
   return layer->masks_to_bounds() || layer->mask_layer();
 }
 
 static bool PointHitsRect(
     const gfx::PointF& screen_space_point,
     const gfx::Transform& local_space_to_screen_space_transform,
     const gfx::RectF& local_space_rect,
     float* distance_to_camera) {
@@ skipping 359 matching lines @@
     scoped_ptr<PendingPageScaleAnimation> pending_animation) {
   pending_page_scale_animation_ = pending_animation.Pass();
 }
 
 scoped_ptr<PendingPageScaleAnimation>
     LayerTreeImpl::TakePendingPageScaleAnimation() {
   return pending_page_scale_animation_.Pass();
 }
 
 }  // namespace cc