Move BrowserThread to content namespace.

chrome/browser/automation/automation_provider.h

Index: chrome/browser/automation/automation_provider.h
diff --git a/chrome/browser/automation/automation_provider.h b/chrome/browser/automation/automation_provider.h
index c082065ab8f30a7b231e5878b238d45fabaf11f8..2ad3b640e2a0828155a487b39d5fb0afe9943ea3 100644
--- a/chrome/browser/automation/automation_provider.h
+++ b/chrome/browser/automation/automation_provider.h
@@ -85,8 +85,8 @@ class AutomationProvider
     : public IPC::Channel::Listener,
       public IPC::Message::Sender,
       public base::SupportsWeakPtr<AutomationProvider>,
-      public base::RefCountedThreadSafe<AutomationProvider,
-                                        BrowserThread::DeleteOnUIThread>,
+      public base::RefCountedThreadSafe<
+          AutomationProvider, content::BrowserThread::DeleteOnUIThread>,
       public TraceSubscriber {
  public:
   explicit AutomationProvider(Profile* profile);
@@ -163,7 +163,8 @@ class AutomationProvider
       const DownloadItem* download);
 
  protected:
-  friend struct BrowserThread::DeleteOnThread<BrowserThread::UI>;
+  friend struct content::BrowserThread::DeleteOnThread<
+      content::BrowserThread::UI>;
   friend class DeleteTask<AutomationProvider>;
   virtual ~AutomationProvider();