Hold a handle to the v8 context in PepperTryCatchVar.

content/renderer/pepper/pepper_try_catch.h

 // Copyright 2014 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 CONTENT_RENDERER_PEPPER_PEPPER_TRY_CATCH_H_
 #define CONTENT_RENDERER_PEPPER_PEPPER_TRY_CATCH_H_
 
 #include "base/basictypes.h"
 #include "content/common/content_export.h"
 #include "content/renderer/pepper/v8_var_converter.h"
@@ skipping 65 matching lines @@
 
   // PepperTryCatch
   virtual void SetException(const char* message) OVERRIDE;
   virtual bool HasException() OVERRIDE;
 
  private:
   // Code which uses PepperTryCatchVar doesn't typically have a HandleScope,
   // make one for them. Note that this class is always allocated on the stack.
   v8::HandleScope handle_scope_;
 
+  v8::Handle<v8::Context> context_;
+
   v8::TryCatch try_catch_;
 
   PP_Var* exception_;
   bool exception_is_set_;
 
   DISALLOW_COPY_AND_ASSIGN(PepperTryCatchVar);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_TRY_CATCH_H_