Add TestBrowserThreadBundle into RenderViewHostTestHarness. Kill some unnecessary real threads.

chrome/browser/extensions/activity_log/activity_log_unittest.cc

Index: chrome/browser/extensions/activity_log/activity_log_unittest.cc
diff --git a/chrome/browser/extensions/activity_log/activity_log_unittest.cc b/chrome/browser/extensions/activity_log/activity_log_unittest.cc
index 62ab52ad0d6cb1c3c8feee4b4c9b734ff98e03f3..cd41b81a2d41bcfc27aae4e2948e267c52ee30f2 100644
--- a/chrome/browser/extensions/activity_log/activity_log_unittest.cc
+++ b/chrome/browser/extensions/activity_log/activity_log_unittest.cc
@@ -14,7 +14,6 @@
 #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/test/test_browser_thread.h"
 #include "sql/statement.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -28,13 +27,11 @@ namespace extensions {
 
 class ActivityLogTest : public ChromeRenderViewHostTestHarness {
  public:
-  ActivityLogTest()
-      : ui_thread_(BrowserThread::UI, MessageLoop::current()),
-        db_thread_(BrowserThread::DB, MessageLoop::current()),
-        file_thread_(BrowserThread::FILE, MessageLoop::current()) {}
-
   virtual void SetUp() OVERRIDE {
     ChromeRenderViewHostTestHarness::SetUp();
+#if defined OS_CHROMEOS
+  test_user_manager_.reset(new chromeos::ScopedTestUserManager());
+#endif
     CommandLine command_line(CommandLine::NO_PROGRAM);
     profile_ =
         Profile::FromBrowserContext(web_contents()->GetBrowserContext());
@@ -48,9 +45,11 @@ class ActivityLogTest : public ChromeRenderViewHostTestHarness {
     ActivityLog::RecomputeLoggingIsEnabled();
   }
 
-  virtual ~ActivityLogTest() {
-    MessageLoop::current()->PostTask(FROM_HERE, MessageLoop::QuitClosure());
-    MessageLoop::current()->Run();
+  virtual void TearDown() OVERRIDE {
+#if defined OS_CHROMEOS
+    test_user_manager_.reset();
+#endif
+    ChromeRenderViewHostTestHarness::TearDown();
   }
 
   static void RetrieveActions_LogAndFetchActions(
@@ -78,15 +77,10 @@ class ActivityLogTest : public ChromeRenderViewHostTestHarness {
   ExtensionService* extension_service_;
   Profile* profile_;
 
- private:
-  content::TestBrowserThread ui_thread_;
-  content::TestBrowserThread db_thread_;
-  content::TestBrowserThread file_thread_;
-
 #if defined OS_CHROMEOS
   chromeos::ScopedTestDeviceSettingsService test_device_settings_service_;
   chromeos::ScopedTestCrosSettings test_cros_settings_;
-  chromeos::ScopedTestUserManager test_user_manager_;
+  scoped_ptr<chromeos::ScopedTestUserManager> test_user_manager_;
 #endif
 };