Add TestBrowserThreadBundle into RenderViewHostTestHarness. Kill some unnecessary real threads.

chrome/browser/translate/translate_manager_browsertest.cc

Index: chrome/browser/translate/translate_manager_browsertest.cc
diff --git a/chrome/browser/translate/translate_manager_browsertest.cc b/chrome/browser/translate/translate_manager_browsertest.cc
index 90110faa714a67a1665d7157d6967d65a70da2c5..8e80c81bc6f01fa8e8e1d59873a3c5b0bbe898c8 100644
--- a/chrome/browser/translate/translate_manager_browsertest.cc
+++ b/chrome/browser/translate/translate_manager_browsertest.cc
@@ -43,7 +43,6 @@
 #include "content/public/test/mock_notification_observer.h"
 #include "content/public/test/mock_render_process_host.h"
 #include "content/public/test/render_view_test.h"
-#include "content/public/test/test_browser_thread.h"
 #include "content/public/test/test_renderer_host.h"
 #include "grit/generated_resources.h"
 #include "ipc/ipc_test_sink.h"
@@ -53,7 +52,6 @@
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebKit.h"
 #include "third_party/cld/languages/public/languages.h"
 
-using content::BrowserThread;
 using content::NavigationController;
 using content::RenderViewHostTester;
 using content::WebContents;
@@ -97,8 +95,7 @@ class TranslateManagerBrowserTest : public ChromeRenderViewHostTestHarness,
   TranslateManagerBrowserTest()
       : pref_callback_(
             base::Bind(&TranslateManagerBrowserTest::OnPreferenceChanged,
-                       base::Unretained(this))),
-        ui_thread_(BrowserThread::UI, &message_loop_) {
+                       base::Unretained(this))) {
   }
 
   // Simulates navigating to a page and getting the page contents and language
@@ -307,7 +304,6 @@ class TranslateManagerBrowserTest : public ChromeRenderViewHostTestHarness,
  private:
   content::NotificationRegistrar notification_registrar_;
   net::TestURLFetcherFactory url_fetcher_factory_;
-  content::TestBrowserThread ui_thread_;
   content::RenderViewTest::RendererWebKitPlatformSupportImplNoSandbox
       webkit_platform_support_;