Move BrowserThread to content namespace.

chrome/browser/sync/glue/browser_thread_model_worker.h

Index: chrome/browser/sync/glue/browser_thread_model_worker.h
diff --git a/chrome/browser/sync/glue/browser_thread_model_worker.h b/chrome/browser/sync/glue/browser_thread_model_worker.h
index 683dd4549171afc832f26a1c1af9f1d239f81cf4..843b9dad456d062f891ad94deeb58e8dee3d9b61 100644
--- a/chrome/browser/sync/glue/browser_thread_model_worker.h
+++ b/chrome/browser/sync/glue/browser_thread_model_worker.h
@@ -24,7 +24,8 @@ namespace browser_sync {
 // TODO(sync): Try to generalize other ModelWorkers (e.g. history, etc).
 class BrowserThreadModelWorker : public browser_sync::ModelSafeWorker {
  public:
-  BrowserThreadModelWorker(BrowserThread::ID thread, ModelSafeGroup group);
+  BrowserThreadModelWorker(content::BrowserThread::ID thread,
+                           ModelSafeGroup group);
   virtual ~BrowserThreadModelWorker();
 
   // ModelSafeWorker implementation. Called on the sync thread.
@@ -42,7 +43,7 @@ class BrowserThreadModelWorker : public browser_sync::ModelSafeWorker {
       UnrecoverableErrorInfo* error_info) = 0;
 
  private:
-  BrowserThread::ID thread_;
+  content::BrowserThread::ID thread_;
   ModelSafeGroup group_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserThreadModelWorker);