extensions: Use stl utilities from the base namespace

extensions/browser/app_window/app_window_geometry_cache.cc

 // Copyright 2014 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 "extensions/browser/app_window/app_window_geometry_cache.h"
 
 #include <stdint.h>
 
 #include <utility>
 
@@ skipping 38 matching lines @@
                                           const gfx::Rect& bounds,
                                           const gfx::Rect& screen_bounds,
                                           ui::WindowShowState window_state) {
   ExtensionData& extension_data = cache_[extension_id];
 
   // If we don't have any unsynced changes and this is a duplicate of what's
   // already in the cache, just ignore it.
   if (extension_data[window_id].bounds == bounds &&
       extension_data[window_id].window_state == window_state &&
       extension_data[window_id].screen_bounds == screen_bounds &&
-      !ContainsKey(unsynced_extensions_, extension_id))
+      !base::ContainsKey(unsynced_extensions_, extension_id))
     return;
 
   base::Time now = base::Time::Now();
 
   extension_data[window_id].bounds = bounds;
   extension_data[window_id].screen_bounds = screen_bounds;
   extension_data[window_id].window_state = window_state;
   extension_data[window_id].last_change = now;
 
   if (extension_data.size() > kMaxCachedWindows) {
@@ skipping 230 matching lines @@
 
 void AppWindowGeometryCache::AddObserver(Observer* observer) {
   observers_.AddObserver(observer);
 }
 
 void AppWindowGeometryCache::RemoveObserver(Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
 }  // namespace extensions