Hold a handle to the v8 context in PepperTryCatchVar.

content/renderer/pepper/pepper_try_catch.cc

 // 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.
 
 #include "content/renderer/pepper/pepper_try_catch.h"
 
 #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
 #include "gin/converter.h"
 #include "ppapi/shared_impl/ppapi_globals.h"
 #include "ppapi/shared_impl/var_tracker.h"
@@ skipping 101 matching lines @@
   if (HasException())
     return;
 
   exception_ = ppapi::StringVar::StringToPPVar(message);
 }
 
 PepperTryCatchVar::PepperTryCatchVar(PepperPluginInstanceImpl* instance,
                                      PP_Var* exception)
     : PepperTryCatch(instance, V8VarConverter::kAllowObjectVars),
       handle_scope_(instance_->GetIsolate()),
+      context_(GetContext()),
       exception_(exception),
       exception_is_set_(false) {
-  // We switch to the plugin context.
-  v8::Handle<v8::Context> context = GetContext();
-  if (!context.IsEmpty())
-    context->Enter();
+  // We switch to the plugin context if it's not empty.
+  if (!context_.IsEmpty())
+    context_->Enter();
 }
 
 PepperTryCatchVar::~PepperTryCatchVar() {
-  v8::Handle<v8::Context> context = GetContext();
-  if (!context.IsEmpty())
-    context->Exit();
+  if (!context_.IsEmpty())
+    context_->Exit();
 }
 
 bool PepperTryCatchVar::HasException() {
   if (exception_is_set_)
     return true;
 
   std::string exception_message;
   if (GetContext().IsEmpty()) {
     exception_message = "The v8 context has been destroyed.";
   } else if (try_catch_.HasCaught()) {
@@ skipping 13 matching lines @@
 void PepperTryCatchVar::SetException(const char* message) {
   if (exception_is_set_)
     return;
 
   if (exception_)
     *exception_ = ppapi::StringVar::StringToPPVar(message, strlen(message));
   exception_is_set_ = true;
 }
 
 }  // namespace content