Make SharedMemoryHandle a class on windows.

content/renderer/npapi/webplugin_delegate_proxy.cc

Index: content/renderer/npapi/webplugin_delegate_proxy.cc
diff --git a/content/renderer/npapi/webplugin_delegate_proxy.cc b/content/renderer/npapi/webplugin_delegate_proxy.cc
index 22d2799625fc3198b73058ecdf8e097241601c26..edd39bdad7c29ccad1c3605b16415d9a5693f106 100644
--- a/content/renderer/npapi/webplugin_delegate_proxy.cc
+++ b/content/renderer/npapi/webplugin_delegate_proxy.cc
@@ -501,10 +501,7 @@ static void CopySharedMemoryHandleForMessage(
   *handle_out = base::SharedMemory::DuplicateHandle(handle_in);
 #elif defined(OS_WIN)
   // On Windows we need to duplicate the handle for the plugin process.
-  *handle_out = NULL;
-  BrokerDuplicateHandle(handle_in, peer_pid, handle_out,
-                        FILE_MAP_READ | FILE_MAP_WRITE, 0);
-  DCHECK(*handle_out != NULL);
+  BrokerDuplicateSharedMemoryHandle(handle_in, peer_pid, handle_out);
 #else
 #error Shared memory copy not implemented.
 #endif
@@ -645,7 +642,8 @@ bool WebPluginDelegateProxy::CreateSharedBitmap(
 #else
   canvas->reset(skia::CreatePlatformCanvas(
       plugin_rect_.width(), plugin_rect_.height(), true,
-      (*memory)->shared_memory()->handle(), skia::RETURN_NULL_ON_FAILURE));
+      (*memory)->shared_memory()->handle().GetHandle(),
+      skia::RETURN_NULL_ON_FAILURE));
 #endif
   return !!canvas->get();
 }