Move FilePathWatcher class from browser/... to common/...

chrome/browser/user_style_sheet_watcher.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/browser/user_style_sheet_watcher.h"
 
 #include "base/base64.h"
 #include "base/file_util.h"
 #include "content/common/notification_service.h"
 #include "content/common/notification_type.h"
@@ skipping 130 matching lines @@
   if (!BrowserThread::CurrentlyOn(BrowserThread::FILE)) {
     BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
         NewRunnableMethod(this, &UserStyleSheetWatcher::Init));
     return;
   }
 
   if (!file_watcher_.get()) {
     file_watcher_.reset(new FilePathWatcher);
     FilePath style_sheet_file = profile_path_.AppendASCII(kStyleSheetDir)
                                              .AppendASCII(kUserStyleSheetFile);
-    if (!file_watcher_->Watch(style_sheet_file, loader_.get()))
+    if (!file_watcher_->Watch(
+        style_sheet_file,
+        loader_.get(),
+        BrowserThread::GetMessageLoopProxyForThread(BrowserThread::UI))) {
       LOG(ERROR) << "Failed to setup watch for " << style_sheet_file.value();
+    }
     loader_->LoadStyleSheet(style_sheet_file);
   }
 }
 
 GURL UserStyleSheetWatcher::user_style_sheet() const {
   return loader_->user_style_sheet();
 }
 
 void UserStyleSheetWatcher::Observe(NotificationType type,
     const NotificationSource& source, const NotificationDetails& details) {
   DCHECK(type == NotificationType::RENDER_VIEW_HOST_CREATED_FOR_TAB);
   loader_->NotifyLoaded();
   registrar_.RemoveAll();
 }