Rewrite extensions console to not leak function templates.

extensions/renderer/object_backed_native_handler.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 "extensions/renderer/object_backed_native_handler.h"
 
 #include <stddef.h>
 
 #include "base/logging.h"
 #include "content/public/child/worker_thread.h"
@@ skipping 39 matching lines @@
 
   v8::Local<v8::Value> handler_function_value;
   v8::Local<v8::Value> feature_name_value;
   // See comment in header file for why we do this.
   if (!GetPrivate(context, data, kHandlerFunction, &handler_function_value) ||
       handler_function_value->IsUndefined() ||
       !GetPrivate(context, data, kFeatureName, &feature_name_value) ||
       !feature_name_value->IsString()) {
     ScriptContext* script_context =
         ScriptContextSet::GetContextByV8Context(context);
-    console::Error(script_context ? script_context->GetRenderFrame() : nullptr,
-                   "Extension view no longer exists");
+    console::AddMessage(
+        script_context ? script_context->GetRenderFrame() : nullptr,
+        content::CONSOLE_MESSAGE_LEVEL_ERROR,
+        "Extension view no longer exists");
     return;
   }
 
   // We can't access the ScriptContextSet on a worker thread. Luckily, we also
   // don't inject many bindings into worker threads.
   // TODO(devlin): Figure out a way around this.
   if (content::WorkerThread::GetCurrentId() == 0) {
     ScriptContext* script_context =
         ScriptContextSet::GetContextByV8Context(context);
     v8::Local<v8::String> feature_name_string =
@@ skipping 149 matching lines @@
                                               v8::Local<v8::Object> obj,
                                               const char* key) {
   obj->DeletePrivate(context,
                      v8::Private::ForApi(
                          context->GetIsolate(),
                          v8::String::NewFromUtf8(context->GetIsolate(), key)))
       .FromJust();
 }
 
 }  // namespace extensions