Add TestBrowserThreadBundle into RenderViewHostTestHarness. Kill some unnecessary real threads.

chrome/browser/extensions/extension_protocols_unittest.cc

Index: chrome/browser/extensions/extension_protocols_unittest.cc
diff --git a/chrome/browser/extensions/extension_protocols_unittest.cc b/chrome/browser/extensions/extension_protocols_unittest.cc
index 6848b567a6e6ef1c013cdcdfb593057c9246939c..f5d9085c2666fcc7b9d8f1a93bc35f61a4812224 100644
--- a/chrome/browser/extensions/extension_protocols_unittest.cc
+++ b/chrome/browser/extensions/extension_protocols_unittest.cc
@@ -16,7 +16,7 @@
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/resource_request_info.h"
 #include "content/public/test/mock_resource_context.h"
-#include "content/public/test/test_browser_thread.h"
+#include "content/public/test/test_browser_thread_bundle.h"
 #include "extensions/common/constants.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_job_factory_impl.h"
@@ -24,8 +24,6 @@
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-using content::BrowserThread;
-
 namespace extensions {
 
 scoped_refptr<Extension> CreateTestExtension(const std::string& name,
@@ -88,9 +86,7 @@ scoped_refptr<Extension> CreateTestResponseHeaderExtension() {
 class ExtensionProtocolTest : public testing::Test {
  public:
   ExtensionProtocolTest()
-      : ui_thread_(BrowserThread::UI, &message_loop_),
-        file_thread_(BrowserThread::FILE, &message_loop_),
-        io_thread_(BrowserThread::IO, &message_loop_) {}
+      : thread_bundle_(content::TestBrowserThreadBundle::IO_MAINLOOP) {}
 
   virtual void SetUp() OVERRIDE {
     testing::Test::SetUp();
@@ -127,10 +123,7 @@ class ExtensionProtocolTest : public testing::Test {
   }
 
  protected:
-  base::MessageLoopForIO message_loop_;
-  content::TestBrowserThread ui_thread_;
-  content::TestBrowserThread file_thread_;
-  content::TestBrowserThread io_thread_;
+  content::TestBrowserThreadBundle thread_bundle_;
   scoped_refptr<ExtensionInfoMap> extension_info_map_;
   net::URLRequestJobFactoryImpl job_factory_;
   const net::URLRequestJobFactory* old_factory_;