Add export directives needed by Chromium WM project.

content/browser/gpu/browser_gpu_channel_host_factory.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_GPU_BROWSER_GPU_CHANNEL_HOST_FACTORY_H_
 #define CONTENT_BROWSER_GPU_BROWSER_GPU_CHANNEL_HOST_FACTORY_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/process.h"
 #include "base/synchronization/waitable_event.h"
+#include "content/common/content_export.h"
 #include "content/common/gpu/client/gpu_channel_host.h"
 #include "ipc/ipc_channel_handle.h"
 
 namespace content {
 
-class BrowserGpuChannelHostFactory : public GpuChannelHostFactory {
+class CONTENT_EXPORT BrowserGpuChannelHostFactory :
+    public GpuChannelHostFactory {
  public:
   static void Initialize();
   static void Terminate();
   static BrowserGpuChannelHostFactory* instance() { return instance_; }
 
   // GpuChannelHostFactory implementation.
   virtual bool IsMainThread() OVERRIDE;
   virtual bool IsIOThread() OVERRIDE;
   virtual MessageLoop* GetMainLoop() OVERRIDE;
   virtual scoped_refptr<base::MessageLoopProxy> GetIOLoopProxy() OVERRIDE;
@@ skipping 70 matching lines @@
   int gpu_host_id_;
 
   static BrowserGpuChannelHostFactory* instance_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserGpuChannelHostFactory);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GPU_BROWSER_GPU_CHANNEL_HOST_FACTORY_H_