cc: Use BeginFrameArgs

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 "base/strings/stringprintf.h"
 #include "base/debug/trace_event.h"
 #include "cc/animation/keyframed_animation_curve.h"
 #include "cc/animation/scrollbar_animation_controller.h"
 #include "cc/debug/traced_value.h"
 #include "cc/layers/heads_up_display_layer_impl.h"
 #include "cc/layers/render_surface_impl.h"
 #include "cc/layers/scrollbar_layer_impl.h"
 #include "cc/trees/layer_tree_host_common.h"
 #include "cc/trees/layer_tree_host_impl.h"
 #include "ui/gfx/size_conversions.h"
@@ skipping 154 matching lines @@
     float min_page_scale_factor, float max_page_scale_factor) {
   if (!page_scale_factor)
     return;
 
   min_page_scale_factor_ = min_page_scale_factor;
   max_page_scale_factor_ = max_page_scale_factor;
   page_scale_factor_ = page_scale_factor;
 }
 
 void LayerTreeImpl::SetPageScaleDelta(float delta) {
+  std::string str;
+  base::StringAppendF(&str, "%s : delta %f",
+                      __PRETTY_FUNCTION__,
+                      delta);
+  TRACE_EVENT0("cc", str.c_str());
+
   // Clamp to the current min/max limits.
   float total = page_scale_factor_ * delta;
   if (min_page_scale_factor_ && total < min_page_scale_factor_)
     delta = min_page_scale_factor_ / page_scale_factor_;
   else if (max_page_scale_factor_ && total > max_page_scale_factor_)
     delta = max_page_scale_factor_ / page_scale_factor_;
 
   if (delta == page_scale_delta_)
     return;
-
+TRACE_EVENT0("cc", __PRETTY_FUNCTION__);
   page_scale_delta_ = delta;
 
   if (IsActiveTree()) {
     LayerTreeImpl* pending_tree = layer_tree_host_impl_->pending_tree();
     if (pending_tree) {
       DCHECK_EQ(1, pending_tree->sent_page_scale_delta());
       pending_tree->SetPageScaleDelta(
           page_scale_delta_ / sent_page_scale_delta_);
     }
   }
@@ skipping 366 matching lines @@
 
 void LayerTreeImpl::ClearLatencyInfo() {
   latency_info_.Clear();
 }
 
 void LayerTreeImpl::WillModifyTilePriorities() {
   layer_tree_host_impl_->SetNeedsManageTiles();
 }
 
 }  // namespace cc