Unify the three places that patch font loading for PDFium on Windows.

content/ppapi_plugin/ppapi_thread.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_PPAPI_PLUGIN_PPAPI_THREAD_H_
 #define CONTENT_PPAPI_PLUGIN_PPAPI_THREAD_H_
 
 #include <map>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/process/process.h"
 #include "base/scoped_native_library.h"
 #include "build/build_config.h"
-#include "content/child/child_thread.h"
+#include "content/child/child_thread_impl.h"
 #include "content/public/common/pepper_plugin_info.h"
 #include "ppapi/c/pp_module.h"
 #include "ppapi/c/trusted/ppp_broker.h"
 #include "ppapi/proxy/connection.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
 #include "ppapi/proxy/plugin_globals.h"
 #include "ppapi/proxy/plugin_proxy_delegate.h"
 
 #if defined(OS_WIN)
 #include "base/win/scoped_handle.h"
 #endif
 
 namespace base {
 class CommandLine;
 class FilePath;
 }
 
 namespace IPC {
 struct ChannelHandle;
 }
 
 namespace content {
 
 class PpapiBlinkPlatformImpl;
 
-class PpapiThread : public ChildThread,
+#if defined(COMPILER_MSVC)
+// See explanation for other RenderViewHostImpl which is the same issue.
+#pragma warning(push)
+#pragma warning(disable: 4250)
+#endif
+
+class PpapiThread : public ChildThreadImpl,
                     public ppapi::proxy::PluginDispatcher::PluginDelegate,
                     public ppapi::proxy::PluginProxyDelegate {
  public:
   PpapiThread(const base::CommandLine& command_line, bool is_broker);
   ~PpapiThread() override;
   void Shutdown() override;
 
  private:
   // Make sure the enum list in tools/histogram/histograms.xml is updated with
   // any change in this list.
@@ skipping 97 matching lines @@
   scoped_ptr<PpapiBlinkPlatformImpl> blink_platform_impl_;
 
 #if defined(OS_WIN)
   // Caches the handle to the peer process if this is a broker.
   base::win::ScopedHandle peer_handle_;
 #endif
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(PpapiThread);
 };
 
+#if defined(COMPILER_MSVC)
+#pragma warning(pop)
+#endif
+
 }  // namespace content
 
 #endif  // CONTENT_PPAPI_PLUGIN_PPAPI_THREAD_H_