Keep NaCl plugins used in app background pages alive when active.

ppapi/shared_impl/ppapi_globals.h

 // Copyright (c) 2012 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.
 
 #ifndef PPAPI_SHARED_IMPL_PPAPI_GLOBALS_H_
 #define PPAPI_SHARED_IMPL_PPAPI_GLOBALS_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 110 matching lines @@
   virtual std::string GetCmdLine() = 0;
 
   // Preloads the font on Windows, does nothing on other platforms.
   // TODO(brettw) remove this by passing the instance into the API so we don't
   // have to have it on the globals.
   virtual void PreCacheFontForFlash(const void* logfontw) = 0;
 
   virtual bool IsHostGlobals() const;
   virtual bool IsPluginGlobals() const;
 
+  // Record that plugin is active. Avoids being shutdown in containers that

[dmichael (off chromium), 2013/11/15 18:26:22]

nits:
"the" plugin
Avoids->Prevents

[scheib, 2013/12/11 21:35:40]

Done.

+  // detect idle content.

[dmichael (off chromium), 2013/11/15 18:26:22]

such as background apps?

[scheib, 2013/12/11 21:35:40]

Done.

+  // This method only has an effect on the plugin process, calls from the
+  // renderer process will have an effect.

[dmichael (off chromium), 2013/11/15 18:26:22]

an->no ?

[scheib, 2013/12/11 21:35:40]

Done.

+  virtual void MarkPluginIsActive();
+
  private:
   // Return the thread-local pointer which is used only for unit testing. It
   // should always be NULL when running in production. It allows separate
   // threads to have distinct "globals".
   static PpapiGlobals* GetThreadLocalPointer();
 
   scoped_refptr<base::MessageLoopProxy> main_loop_proxy_;
 
   DISALLOW_COPY_AND_ASSIGN(PpapiGlobals);
 };
 
 }  // namespace ppapi
 
 #endif  // PPAPI_SHARED_IMPL_PPAPI_GLOBALS_H_