Add TestBrowserThreadBundle into RenderViewHostTestHarness. Kill some unnecessary real threads.

chrome/browser/extensions/api/identity/experimental_web_auth_flow_unittest.cc

Index: chrome/browser/extensions/api/identity/experimental_web_auth_flow_unittest.cc
diff --git a/chrome/browser/extensions/api/identity/experimental_web_auth_flow_unittest.cc b/chrome/browser/extensions/api/identity/experimental_web_auth_flow_unittest.cc
index e6eb2c3cb85504dd8222aa1014f479abb325d3a7..86530fa624eb4d24ee182c03702178ec6868b0e8 100644
--- a/chrome/browser/extensions/api/identity/experimental_web_auth_flow_unittest.cc
+++ b/chrome/browser/extensions/api/identity/experimental_web_auth_flow_unittest.cc
@@ -7,15 +7,11 @@
 #include "chrome/browser/ui/host_desktop.h"
 #include "chrome/test/base/chrome_render_view_host_test_harness.h"
 #include "chrome/test/base/testing_profile.h"
-#include "content/public/browser/browser_thread.h"
 #include "content/public/browser/web_contents.h"
-#include "content/public/test/test_browser_thread.h"
 #include "content/public/test/web_contents_tester.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-using content::BrowserThread;
-using content::TestBrowserThread;
 using content::WebContents;
 using content::WebContentsTester;
 using extensions::ExperimentalWebAuthFlow;
@@ -80,14 +76,6 @@ class MockExperimentalWebAuthFlow : public ExperimentalWebAuthFlow {
 
 class ExperimentalWebAuthFlowTest : public ChromeRenderViewHostTestHarness {
  protected:
-  ExperimentalWebAuthFlowTest()
-      : thread_(BrowserThread::UI, &message_loop_) {
-  }
-
-  virtual void SetUp() {
-    ChromeRenderViewHostTestHarness::SetUp();
-  }
-
   virtual void TearDown() {
     // |flow_| must be reset before ChromeRenderViewHostTestHarness::TearDown(),
     // because |flow_| deletes the WebContents it owns via
@@ -114,7 +102,6 @@ class ExperimentalWebAuthFlowTest : public ChromeRenderViewHostTestHarness {
     flow_base()->AfterUrlLoaded();
   }
 
-  TestBrowserThread thread_;
   MockDelegate delegate_;
   scoped_ptr<MockExperimentalWebAuthFlow> flow_;
 };