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

chrome/browser/browsing_data_remover_unittest.cc

Index: chrome/browser/browsing_data_remover_unittest.cc
diff --git a/chrome/browser/browsing_data_remover_unittest.cc b/chrome/browser/browsing_data_remover_unittest.cc
index d499ba33117ad9e1a40a2d13b90a27c7e2766c92..1d4dfc96f54b15cc31931f24b26091731ee63fce 100644
--- a/chrome/browser/browsing_data_remover_unittest.cc
+++ b/chrome/browser/browsing_data_remover_unittest.cc
@@ -15,6 +15,7 @@
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/testing_pref_service.h"
 #include "chrome/test/base/testing_profile.h"
+#include "content/test/test_browser_thread.h"
 #include "net/base/cookie_monster.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_context_getter.h"
@@ -289,11 +290,11 @@ class BrowsingDataRemoverTest : public testing::Test {
   // message_loop_, as well as all the threads associated with it must be
   // defined before profile_ to prevent explosions. Oh how I love C++.
   MessageLoopForUI message_loop_;
-  BrowserThread ui_thread_;
-  BrowserThread db_thread_;
-  BrowserThread webkit_thread_;
-  BrowserThread file_thread_;
-  BrowserThread io_thread_;
+  content::TestBrowserThread ui_thread_;
+  content::TestBrowserThread db_thread_;
+  content::TestBrowserThread webkit_thread_;
+  content::TestBrowserThread file_thread_;
+  content::TestBrowserThread io_thread_;
   scoped_ptr<TestingProfile> profile_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowsingDataRemoverTest);