Re-land: cc: Add raster finished signals to RasterWorkerPool.

cc/trees/layer_tree_host_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_host_impl.h"
 
 #include <algorithm>
 
 #include "base/basictypes.h"
 #include "base/json/json_writer.h"
@@ skipping 1332 matching lines @@
       "Checking for completed uploads within a draw may trigger "
       "spurious redraws.";
   if (tile_manager_)
     tile_manager_->CheckForCompletedTileUploads();
 }
 
 void LayerTreeHostImpl::ActivatePendingTreeIfNeeded() {
   DCHECK(pending_tree_);
   CHECK(settings_.impl_side_painting);
 
-  // This call may activate the tree.
-  CheckForCompletedTileUploads();
   if (!pending_tree_)
     return;
 
   // The tile manager is usually responsible for notifying activation.
   // If there is no tile manager, then we need to manually activate.
   if (!tile_manager_ || tile_manager_->AreTilesRequiredForActivationReady()) {
     ActivatePendingTree();
     return;
   }
 
@@ skipping 974 matching lines @@
 }
 
 void LayerTreeHostImpl::SetDebugState(const LayerTreeDebugState& debug_state) {
   if (debug_state_.continuous_painting != debug_state.continuous_painting)
     paint_time_counter_->ClearHistory();
 
   debug_state_ = debug_state;
 }
 
 }  // namespace cc