Move BrowserThread to content namespace.

chrome/browser/browser_process_impl.cc

Index: chrome/browser/browser_process_impl.cc
diff --git a/chrome/browser/browser_process_impl.cc b/chrome/browser/browser_process_impl.cc
index 5a3a0ef22b53472303dafd54762e3a15e195a5bb..2e972b02f8369a18e48b3cd48b150cc6f3309028 100644
--- a/chrome/browser/browser_process_impl.cc
+++ b/chrome/browser/browser_process_impl.cc
@@ -129,6 +129,8 @@ static bool g_end_session_file_thread_has_completed = false;
 static const int kEndSessionTimeoutSeconds = 10;
 #endif
 
+using content::BrowserThread;
+
 BrowserProcessImpl::BrowserProcessImpl(const CommandLine& command_line)
     : created_resource_dispatcher_host_(false),
       created_metrics_service_(false),
@@ -893,7 +895,7 @@ void BrowserProcessImpl::CreateCacheThread() {
   created_cache_thread_ = true;
 
   scoped_ptr<base::Thread> thread(
-      new DeprecatedBrowserThread(BrowserThread::CACHE));
+      new content::DeprecatedBrowserThread(BrowserThread::CACHE));
   base::Thread::Options options;
   options.message_loop_type = MessageLoop::TYPE_IO;
   if (!thread->StartWithOptions(options))