Use a direct include of strings headers in extensions/, google_apis/, gpu/.

gpu/command_buffer/service/renderbuffer_manager.cc

 // Copyright (c) 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 "gpu/command_buffer/service/renderbuffer_manager.h"
+#include "base/debug/trace_event.h"
 #include "base/logging.h"
-#include "base/debug/trace_event.h"
-#include "base/stringprintf.h"
+#include "base/strings/stringprintf.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 #include "gpu/command_buffer/service/memory_tracking.h"
 #include "ui/gl/gl_implementation.h"
 
 namespace gpu {
 namespace gles2 {
 
 RenderbufferManager::RenderbufferManager(
     MemoryTracker* memory_tracker,
@@ skipping 163 matching lines @@
         return GL_RGB;
     }
   }
   return impl_format;
 }
 
 }  // namespace gles2
 }  // namespace gpu