Split BrowserThread into public API and private implementation, step 1.

chrome/browser/sync/glue/sync_backend_host_unittest.cc

Index: chrome/browser/sync/glue/sync_backend_host_unittest.cc
diff --git a/chrome/browser/sync/glue/sync_backend_host_unittest.cc b/chrome/browser/sync/glue/sync_backend_host_unittest.cc
index 261063eb26da5ee3463e38cdda2b11bb39f9fac8..629d18cc698e065110ad0a40bc10e43a8dd89e71 100644
--- a/chrome/browser/sync/glue/sync_backend_host_unittest.cc
+++ b/chrome/browser/sync/glue/sync_backend_host_unittest.cc
@@ -12,10 +12,10 @@
 #include "chrome/browser/sync/protocol/sync_protocol_error.h"
 #include "chrome/browser/sync/sync_prefs.h"
 #include "chrome/browser/sync/syncable/model_type.h"
-#include "chrome/test/base/testing_profile.h"
 #include "chrome/test/base/test_url_request_context_getter.h"
-#include "content/browser/browser_thread.h"
+#include "chrome/test/base/testing_profile.h"
 #include "content/common/net/url_fetcher.h"
+#include "content/test/test_browser_thread.h"
 #include "content/test/test_url_fetcher_factory.h"
 #include "googleurl/src/gurl.h"
 #include "testing/gmock/include/gmock/gmock.h"
@@ -73,8 +73,8 @@ class SyncBackendHostTest : public testing::Test {
 
  private:
   MessageLoop ui_loop_;
-  BrowserThread ui_thread_;
-  BrowserThread io_thread_;
+  content::TestBrowserThread ui_thread_;
+  content::TestBrowserThread io_thread_;
 };
 
 TEST_F(SyncBackendHostTest, InitShutdown) {