Fix several issues around fullscreen Mac plugins:...

chrome/browser/plugin_process_host.cc

Index: chrome/browser/plugin_process_host.cc
===================================================================
--- chrome/browser/plugin_process_host.cc	(revision 27721)
+++ chrome/browser/plugin_process_host.cc	(working copy)
@@ -325,6 +325,11 @@
        window_index++) {
     PostMessage(*window_index, WM_CLOSE, 0, 0);
   }
+#elif defined(OS_MACOSX)
+  // If the plugin process crashed but had windows open at the time, make
+  // sure that the menu bar is visible.
+  if (!plugin_visible_windows_set_.empty())
+    SetSystemUIMode(kUIModeNormal, 0);
 #endif
 }
 
@@ -477,6 +482,16 @@
     IPC_MESSAGE_HANDLER(PluginProcessHostMsg_MapNativeViewId,
                         OnMapNativeViewId)
 #endif
+#if defined(OS_MACOSX)
+    IPC_MESSAGE_HANDLER(PluginProcessHostMsg_PluginSelectWindow,
+                        OnPluginSelectWindow)
+    IPC_MESSAGE_HANDLER(PluginProcessHostMsg_PluginShowWindow,
+                        OnPluginShowWindow)
+    IPC_MESSAGE_HANDLER(PluginProcessHostMsg_PluginHideWindow,
+                        OnPluginHideWindow)
+    IPC_MESSAGE_HANDLER(PluginProcessHostMsg_PluginDisposeWindow,
+                        OnPluginDisposeWindow)
+#endif
     IPC_MESSAGE_UNHANDLED_ERROR()
   IPC_END_MESSAGE_MAP()
 }