Let IPC::SyncMessageFilter take advantage of thread-safe Send.

content/child/indexed_db/webidbcursor_impl_unittest.cc

 // Copyright 2013 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/memory/scoped_ptr.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/values.h"
 #include "content/child/indexed_db/indexed_db_dispatcher.h"
 #include "content/child/indexed_db/indexed_db_key_builders.h"
 #include "content/child/indexed_db/webidbcursor_impl.h"
@@ skipping 97 matching lines @@
       *key_ = IndexedDBKeyBuilder::Build(key);
     if (web_blob_info_)
       *web_blob_info_ = webBlobInfo;
   }
 
  private:
   IndexedDBKey* key_;
   WebVector<WebBlobInfo>* web_blob_info_;
 };
 
+class MockSyncMessageFilter : public IPC::SyncMessageFilter {
+ public:
+  MockSyncMessageFilter()
+      : SyncMessageFilter(nullptr, false /* is_channel_send_thread_safe */) {}
+
+ private:
+  ~MockSyncMessageFilter() override {}
+};
+
 }  // namespace
 
 class WebIDBCursorImplTest : public testing::Test {
  public:
   WebIDBCursorImplTest() {
     null_key_.assignNull();
-    sync_message_filter_ = new IPC::SyncMessageFilter(NULL);
     thread_safe_sender_ = new ThreadSafeSender(
-        base::ThreadTaskRunnerHandle::Get(), sync_message_filter_.get());
+        base::ThreadTaskRunnerHandle::Get(), new MockSyncMessageFilter);
     dispatcher_ =
         make_scoped_ptr(new MockDispatcher(thread_safe_sender_.get()));
   }
 
  protected:
   base::MessageLoop message_loop_;
   WebIDBKey null_key_;
   scoped_refptr<ThreadSafeSender> thread_safe_sender_;
   scoped_ptr<MockDispatcher> dispatcher_;
 
  private:
-  scoped_refptr<IPC::SyncMessageFilter> sync_message_filter_;
-
   DISALLOW_COPY_AND_ASSIGN(WebIDBCursorImplTest);
 };
 
 TEST_F(WebIDBCursorImplTest, PrefetchTest) {
   const int64 transaction_id = 1;
   {
     WebIDBCursorImpl cursor(WebIDBCursorImpl::kInvalidCursorId,
                             transaction_id,
                             thread_safe_sender_.get());
 
@@ skipping 172 matching lines @@
   // The real dispatcher would call cursor->CachedContinue(), so do that:
   scoped_ptr<WebIDBCallbacks> callbacks(new MockContinueCallbacks());
   cursor.CachedContinue(callbacks.get());
 
   // Now the cursor should have reset the rest of the cache.
   EXPECT_EQ(1, dispatcher_->reset_calls());
   EXPECT_EQ(1, dispatcher_->last_used_count());
 }
 
 }  // namespace content