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

chrome/browser/ui/webui/web_ui_unittest.cc

Index: chrome/browser/ui/webui/web_ui_unittest.cc
diff --git a/chrome/browser/ui/webui/web_ui_unittest.cc b/chrome/browser/ui/webui/web_ui_unittest.cc
index 091bff4c3f55a2135698f5dd2046bc4803f29acd..0bbdfe0b7562dc9fb3ce8f370876d783a233edb6 100644
--- a/chrome/browser/ui/webui/web_ui_unittest.cc
+++ b/chrome/browser/ui/webui/web_ui_unittest.cc
@@ -8,10 +8,10 @@
 #include "chrome/browser/ui/tab_contents/test_tab_contents_wrapper.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/test/base/testing_profile.h"
-#include "content/browser/browser_thread.h"
 #include "content/browser/site_instance.h"
 #include "content/browser/tab_contents/navigation_controller.h"
 #include "content/browser/tab_contents/test_tab_contents.h"
+#include "content/test/test_browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 class WebUITest : public TabContentsWrapperTestHarness {
@@ -77,7 +77,7 @@ class WebUITest : public TabContentsWrapperTestHarness {
   }
 
  private:
-  BrowserThread ui_thread_;
+  content::TestBrowserThread ui_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(WebUITest);
 };