FBTF: Move virtual methods to implementation files.

chrome/browser/device_orientation/provider.cc

 // Copyright (c) 2010 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/browser/device_orientation/provider.h"
 
 #include "base/logging.h"
 #include "chrome/browser/chrome_thread.h"
 
 #if defined(OS_MACOSX)
@@ skipping 22 matching lines @@
 
 void Provider::SetInstanceForTests(Provider* provider) {
   DCHECK(!instance_);
   instance_ = provider;
 }
 
 Provider* Provider::GetInstanceForTests() {
   return instance_;
 }
 
+Provider::Provider() {
+}
+
+Provider::~Provider() {
+  DCHECK(instance_ == this);
+  instance_ = NULL;
+}
+
 Provider* Provider::instance_ = NULL;
 
 } //  namespace device_orientation