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

gpu/command_buffer/service/memory_program_cache.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/memory_program_cache.h"
 
 #include "base/base64.h"
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/sha1.h"
-#include "base/string_number_conversions.h"
+#include "base/strings/string_number_conversions.h"
 #include "gpu/command_buffer/common/constants.h"
 #include "gpu/command_buffer/service/disk_cache_proto.pb.h"
 #include "gpu/command_buffer/service/gl_utils.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 #include "gpu/command_buffer/service/gpu_switches.h"
 #include "gpu/command_buffer/service/shader_manager.h"
 #include "ui/gl/gl_bindings.h"
 
 namespace {
 
@@ skipping 301 matching lines @@
       attrib_map_0(_attrib_map_0),
       uniform_map_0(_uniform_map_0),
       shader_1_hash(_shader_1_hash, kHashLength),
       attrib_map_1(_attrib_map_1),
       uniform_map_1(_uniform_map_1) {}
 
 MemoryProgramCache::ProgramCacheValue::~ProgramCacheValue() {}
 
 }  // namespace gles2
 }  // namespace gpu