Add IPC to notify BrowserPlugin when RenderProcess is ready.

content/renderer/browser_plugin/browser_plugin.cc

Index: content/renderer/browser_plugin/browser_plugin.cc
diff --git a/content/renderer/browser_plugin/browser_plugin.cc b/content/renderer/browser_plugin/browser_plugin.cc
index d8eb0bb7eca1f5b9f71fa7b5745fb06ce544a46c..6889d05ef8585018faab282793967e7ed670d287 100644
--- a/content/renderer/browser_plugin/browser_plugin.cc
+++ b/content/renderer/browser_plugin/browser_plugin.cc
@@ -104,6 +104,7 @@ bool BrowserPlugin::OnMessageReceived(const IPC::Message& message) {
   IPC_BEGIN_MESSAGE_MAP(BrowserPlugin, message)
     IPC_MESSAGE_HANDLER(BrowserPluginMsg_AdvanceFocus, OnAdvanceFocus)
     IPC_MESSAGE_HANDLER(BrowserPluginMsg_GuestGone, OnGuestGone)
+    IPC_MESSAGE_HANDLER(BrowserPluginMsg_GuestReady, OnGuestReady)
     IPC_MESSAGE_HANDLER(BrowserPluginMsg_SetCursor, OnSetCursor)
     IPC_MESSAGE_HANDLER(BrowserPluginMsg_SetMouseLock, OnSetMouseLock)
     IPC_MESSAGE_HANDLER(BrowserPluginMsg_SetTooltipText, OnSetTooltipText)
@@ -213,6 +214,10 @@ void BrowserPlugin::OnGuestGone(int browser_plugin_instance_id) {
   compositing_helper_->ChildFrameGone();
 }
 
+void BrowserPlugin::OnGuestReady(int browser_plugin_instance_id) {
+  guest_crashed_ = false;
+}
+
 void BrowserPlugin::OnSetCursor(int browser_plugin_instance_id,
                                 const WebCursor& cursor) {
   cursor_ = cursor;