Fix several issues around fullscreen Mac plugins:...

chrome/plugin/plugin_main.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include "app/win_util.h"
 #endif
 #include "base/command_line.h"
@@ skipping 49 matching lines @@
            trimmed_list.c_str(), 1);
   } else {
     NOTREACHED() << "Missing Carbon interposing library";
   }
 }
 #endif  // OS_MACOSX
 
 // main() routine for running as the plugin process.
 int PluginMain(const MainFunctionParams& parameters) {
   // The main thread of the plugin services UI.
+#if defined(OS_MACOSX)
+  // For Mac NPAPI plugins, we don't want a MessageLoop::TYPE_UI because
+  // that will cause events to be dispatched via the Cocoa responder chain.
+  // If the plugin creates its own windows with Carbon APIs (for example,
+  // full screen mode in Flash), those windows would not receive events.
+  // Instead, WebPluginDelegateImpl::OnNullEvent will dispatch any pending
+  // system events directly to the plugin.
+  MessageLoop main_message_loop(MessageLoop::TYPE_DEFAULT);
+#else
   MessageLoop main_message_loop(MessageLoop::TYPE_UI);
+#endif
   std::wstring app_name = chrome::kBrowserAppName;
   PlatformThread::SetName(WideToASCII(app_name + L"_PluginMain").c_str());
 
   // Initialize the SystemMonitor
   base::SystemMonitor::Start();
 
 #if defined(OS_MACOSX)
   TrimInterposeEnvironment();
 #endif
 
@@ skipping 65 matching lines @@
 
     MessageLoop::current()->Run();
   }
 
 #if defined(OS_WIN)
   CoUninitialize();
 #endif
 
   return 0;
 }