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

chrome/browser/sync/glue/http_bridge_unittest.cc

Index: chrome/browser/sync/glue/http_bridge_unittest.cc
diff --git a/chrome/browser/sync/glue/http_bridge_unittest.cc b/chrome/browser/sync/glue/http_bridge_unittest.cc
index 6535ba1f01429320675f3faf501d4b7b7415ca1a..e0877c3ae943e1e3749fde985021c510df8fead8 100644
--- a/chrome/browser/sync/glue/http_bridge_unittest.cc
+++ b/chrome/browser/sync/glue/http_bridge_unittest.cc
@@ -6,7 +6,7 @@
 #include "base/threading/thread.h"
 #include "chrome/browser/sync/glue/http_bridge.h"
 #include "chrome/test/base/test_url_request_context_getter.h"
-#include "content/browser/browser_thread.h"
+#include "content/test/test_browser_thread.h"
 #include "content/test/test_url_fetcher_factory.h"
 #include "net/test/test_server.h"
 #include "net/url_request/url_request_test_util.h"
@@ -84,7 +84,7 @@ class HttpBridgeTest : public testing::Test {
   TestURLRequestContextGetter* fake_default_request_context_getter_;
 
   // Separate thread for IO used by the HttpBridge.
-  BrowserThread io_thread_;
+  content::TestBrowserThread io_thread_;
   MessageLoop loop_;
 };