Fix link issue when component=shared_library

content/browser/gpu/gpu_process_host_ui_shim.h

Index: content/browser/gpu/gpu_process_host_ui_shim.h
diff --git a/content/browser/gpu/gpu_process_host_ui_shim.h b/content/browser/gpu/gpu_process_host_ui_shim.h
index c47d14c57889e1a3383d0b94a26d7a66557f1c2c..b5c35a5fc75516b552c8b51253b817d52c43ad7c 100644
--- a/content/browser/gpu/gpu_process_host_ui_shim.h
+++ b/content/browser/gpu/gpu_process_host_ui_shim.h
@@ -34,7 +34,7 @@ class Message;
 }
 
 // A task that will forward an IPC message to the UI shim.
-class RouteToGpuProcessHostUIShimTask : public Task {
+class CONTENT_EXPORT RouteToGpuProcessHostUIShimTask : public Task {
  public:
   RouteToGpuProcessHostUIShimTask(int host_id, const IPC::Message& msg);
   virtual ~RouteToGpuProcessHostUIShimTask();
@@ -46,7 +46,7 @@ class RouteToGpuProcessHostUIShimTask : public Task {
   IPC::Message msg_;
 };
 
-class GpuProcessHostUIShim
+class CONTENT_EXPORT GpuProcessHostUIShim
     : public IPC::Channel::Listener,
       public IPC::Channel::Sender,
       public base::NonThreadSafe {
@@ -61,7 +61,7 @@ class GpuProcessHostUIShim
   static void Destroy(int host_id);
 
   // Destroy all remaining GpuProcessHostUIShims.
-  CONTENT_EXPORT static void DestroyAll();
+  static void DestroyAll();
 
   static GpuProcessHostUIShim* FromID(int host_id);