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

gpu/config/gpu_dx_diagnostics_win.cc

 // Copyright (c) 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.
 //
 // Functions to enumerate the Dx Diagnostic Tool hierarchy and build up
 // a tree of nodes with name / value properties.
 
 #define INITGUID
 #include <dxdiag.h>
 #include <windows.h>
 
-#include "base/string_number_conversions.h"
+#include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/win/scoped_com_initializer.h"
 #include "gpu/config/gpu_info_collector.h"
 
 namespace gpu {
 
 namespace {
 
 // Traverses the IDxDiagContainer tree and populates a tree of DxDiagNode
 // structures that contains property name / value pairs and subtrees of DirectX
@@ skipping 103 matching lines @@
 
         root->Release();
       }
     }
     provider->Release();
   }
 
   return success;
 }
 }  // namespace gpu