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

gpu/command_buffer/service/error_state.cc

 // Copyright (c) 2013 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/error_state.h"
 
 #include <string>
 
-#include "base/stringprintf.h"
+#include "base/strings/stringprintf.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
 #include "gpu/command_buffer/service/logger.h"
 #include "ui/gl/gl_bindings.h"
 
 namespace gpu {
 namespace gles2 {
 
 class ErrorStateImpl : public ErrorState {
  public:
   explicit ErrorStateImpl(Logger* logger);
@@ skipping 154 matching lines @@
           GLES2Util::GetStringEnum(error) + " : " +
           function_name + ": was unhandled");
       NOTREACHED() << "GL error " << error << " was unhandled.";
     }
   }
 }
 
 }  // namespace gles2
 }  // namespace gpu