Use a direct include of strings headers in content/browser/, part 2.

content/browser/ppapi_plugin_process_host.h

 // 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.
 
 #ifndef CONTENT_BROWSER_PPAPI_PLUGIN_PROCESS_HOST_H_
 #define CONTENT_BROWSER_PPAPI_PLUGIN_PROCESS_HOST_H_
 
 #include <queue>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/files/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/process.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "content/browser/renderer_host/pepper/browser_ppapi_host_impl.h"
 #include "content/browser/renderer_host/pepper/pepper_message_filter.h"
 #include "content/public/browser/browser_child_process_host_delegate.h"
 #include "content/public/browser/browser_child_process_host_iterator.h"
 #include "ipc/ipc_sender.h"
 #include "ppapi/shared_impl/ppapi_permissions.h"
 
 namespace net {
 class HostResolver;
 }
@@ skipping 162 matching lines @@
  public:
   PpapiBrokerProcessHostIterator()
       : BrowserChildProcessHostTypeIterator<
           PpapiPluginProcessHost>(PROCESS_TYPE_PPAPI_BROKER) {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_PPAPI_PLUGIN_PROCESS_HOST_H_