Add missing (and remove superfluous) 'explicit' from constructors.

cc/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/tile_manager.h"
 
 #include <algorithm>
 #include <set>
 
 #include "base/bind.h"
@@ skipping 55 matching lines @@
 
   return cc::EVENTUALLY_BIN;
 }
 
 }  // namespace
 
 namespace cc {
 
 class RasterThread : public base::Thread {
  public:
-  RasterThread(const std::string name)
+  explicit RasterThread(const std::string name)
       : base::Thread(name.c_str()),
         num_pending_tasks_(0) {
     Start();
   }
   virtual ~RasterThread() {
     Stop();
   }
 
   int num_pending_tasks() { return num_pending_tasks_; }
 
@@ skipping 632 matching lines @@
 void TileManager::DidFinishTileInitialization(Tile* tile) {
   ManagedTileState& managed_tile_state = tile->managed_state();
   DCHECK(managed_tile_state.resource);
   managed_tile_state.resource_is_being_initialized = false;
   managed_tile_state.can_be_freed = true;
   for (int i = 0; i < NUM_TREES; ++i)
     drawable_tiles_in_bin_count_[managed_tile_state.bin[i]][i]++;
 }
 
 }