Browser Plugin: Update Guest WebContents Visibility on BrowserPlugin Visiblity Change.

content/browser/browser_plugin/browser_plugin_embedder_helper.cc

Index: content/browser/browser_plugin/browser_plugin_embedder_helper.cc
diff --git a/content/browser/browser_plugin/browser_plugin_embedder_helper.cc b/content/browser/browser_plugin/browser_plugin_embedder_helper.cc
index ac71dd4b342d9b6eac08ff2cf57912c80b9750f6..78866a26aa0c16ce02529d9d7ce377a392eb883c 100644
--- a/content/browser/browser_plugin/browser_plugin_embedder_helper.cc
+++ b/content/browser/browser_plugin/browser_plugin_embedder_helper.cc
@@ -49,6 +49,8 @@ bool BrowserPluginEmbedderHelper::OnMessageReceived(
     IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_Stop, OnStop)
     IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_Reload, OnReload)
     IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_TerminateGuest, OnTerminateGuest)
+    IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_SetVisibility,
+                        OnSetGuestVisibility)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
@@ -153,4 +155,10 @@ void BrowserPluginEmbedderHelper::OnTerminateGuest(int instance_id) {
   embedder_->TerminateGuest(instance_id);
 }
 
+void BrowserPluginEmbedderHelper::OnSetGuestVisibility(int instance_id,
+                                                       bool visible) {
+  embedder_->SetGuestVisibility(instance_id, visible);
+}
+
+
 }  // namespace content