Create thread-safe RendererExtensionRegistry from ExtensionSet

extensions/renderer/gc_callback_unittest.cc

 // Copyright 2015 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 "base/bind.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/extension_set.h"
 #include "extensions/common/features/feature.h"
@@ skipping 11 matching lines @@
 namespace {
 
 void SetToTrue(bool* value) {
   if (*value)
     ADD_FAILURE() << "Value is already true";
   *value = true;
 }
 
 class GCCallbackTest : public testing::Test {
  public:
-  GCCallbackTest() : script_context_set_(&extensions_, &active_extensions_) {}
+  GCCallbackTest() : script_context_set_(&active_extensions_) {}
 
  protected:
   base::MessageLoop& message_loop() { return message_loop_; }
 
   ScriptContextSet& script_context_set() { return script_context_set_; }
 
   v8::Local<v8::Context> v8_context() {
     return v8::Local<v8::Context>::New(v8::Isolate::GetCurrent(), v8_context_);
   }
 
@@ skipping 22 matching lines @@
   }
 
   void TearDown() override {
     gin_context_holder_.reset();
     v8_context_.Reset();
     RequestGarbageCollection();
   }
 
   base::MessageLoop message_loop_;
   ScopedWebFrame web_frame_;  // (this will construct the v8::Isolate)
-  ExtensionSet extensions_;
   ExtensionIdSet active_extensions_;
   ScriptContextSet script_context_set_;
   v8::Global<v8::Context> v8_context_;
   scoped_ptr<gin::ContextHolder> gin_context_holder_;
 
   DISALLOW_COPY_AND_ASSIGN(GCCallbackTest);
 };
 
 TEST_F(GCCallbackTest, GCBeforeContextInvalidated) {
   v8::Isolate* isolate = v8::Isolate::GetCurrent();
@@ skipping 66 matching lines @@
   // Trigger a GC. The callback should not be invoked because the fallback was
   // already invoked.
   RequestGarbageCollection();
   message_loop().RunUntilIdle();
 
   EXPECT_FALSE(callback_invoked);
 }
 
 }  // namespace
 }  // namespace extensions