Add missing base::lock usage.

chrome_frame/vtable_patch_manager_unittest.cc

 // Copyright (c) 2011 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 "chrome_frame/vtable_patch_manager.h"
 
 #include <unknwn.h>
 
 #include "base/message_loop.h"
 #include "base/threading/thread.h"
@@ skipping 182 matching lines @@
   // Patch it again, this should be idempotent.
   EXPECT_HRESULT_SUCCEEDED(
       PatchInterfaceMethods(&factory_, IClassFactory_PatchInfo));
 
   // Should not have changed the VTable on second call.
   EXPECT_EQ(0, memcmp(vtable, GetVtable(&factory_), sizeof(vtable)));
 }
 
 namespace vtable_patch {
 // Expose internal implementation detail, purely for testing.
-extern Lock patch_lock_;
+extern base::Lock patch_lock_;
 
 }  // namespace vtable_patch
 
 TEST_F(VtablePatchManagerTest, ThreadSafePatching) {
   // It's difficult to test for threadsafe patching, but as a close proxy,
   // test for no patching happening from a background thread while the patch
   // lock is held.
   base::Thread background("Background Test Thread");
 
   EXPECT_TRUE(background.Start());
@@ skipping 67 matching lines @@
 
   // Release the patch lock and wait on the event.
   vtable_patch::patch_lock_.Release();
   EXPECT_EQ(WAIT_OBJECT_0, ::WaitForSingleObject(event.Get(), INFINITE));
 
   // Verify that unpatching took place.
   EXPECT_CALL(factory_, LockServer(TRUE))
       .WillOnce(Return(S_FALSE));
   EXPECT_EQ(S_FALSE, factory_.LockServer(TRUE));
 }