cc: Report only on active tiles in tracing.

cc/resources/tile_manager.cc

 // Copyright 2012 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/resources/tile_manager.h"
 
 #include <algorithm>
 #include <limits>
 #include <string>
 
@@ skipping 713 matching lines @@
   return value;
 }
 
 void TileManager::BasicStateAsValueInto(base::debug::TracedValue* state) const {
   state->SetInteger("tile_count", tiles_.size());
   state->BeginDictionary("global_state");
   global_state_.AsValueInto(state);
   state->EndDictionary();
 }
 
-void TileManager::AllTilesAsValueInto(base::debug::TracedValue* state) const {
+void TileManager::AllTilesAsValueInto(
+    base::debug::TracedValue* state,
+    const std::set<const Tile*>& active_tiles) const {
   for (TileMap::const_iterator it = tiles_.begin(); it != tiles_.end(); ++it) {
+    bool is_active = active_tiles.count(it->second) != 0;
     state->BeginDictionary();
-    it->second->AsValueInto(state);
+    it->second->AsValueInto(state, is_active);
     state->EndDictionary();
   }
 }
 
 void TileManager::AssignGpuMemoryToTiles(
     PrioritizedTileSet* tiles,
     TileVector* tiles_that_need_to_be_rasterized) {
   TRACE_EVENT0("cc", "TileManager::AssignGpuMemoryToTiles");
 
   // Maintain the list of released resources that can potentially be re-used
@@ skipping 428 matching lines @@
   TRACE_EVENT0("cc", "TileManager::CheckIfReadyToActivate");
 
   rasterizer_->CheckForCompletedTasks();
   did_check_for_completed_tasks_since_last_schedule_tasks_ = true;
 
   if (IsReadyToActivate())
     client_->NotifyReadyToActivate();
 }
 
 }  // namespace cc