Cleanup: Remove unused content::BrowserThread::DeleteOnWebKitThread.

content/browser/browser_thread_unittest.cc

Index: content/browser/browser_thread_unittest.cc
===================================================================
--- content/browser/browser_thread_unittest.cc	(revision 191102)
+++ content/browser/browser_thread_unittest.cc	(working copy)
@@ -59,21 +59,6 @@
     MessageLoop* message_loop_;
   };
 
-  class NeverDeleted
-      : public base::RefCountedThreadSafe<
-            NeverDeleted, BrowserThread::DeleteOnWebKitThread> {
-   public:
-
-   private:
-    friend struct BrowserThread::DeleteOnThread<
-        BrowserThread::WEBKIT_DEPRECATED>;
-    friend class base::DeleteHelper<NeverDeleted>;
-
-    ~NeverDeleted() {
-      CHECK(false);
-    }
-  };
-
  private:
   scoped_ptr<BrowserThreadImpl> ui_thread_;
   scoped_ptr<BrowserThreadImpl> file_thread_;
@@ -102,10 +87,6 @@
   MessageLoop::current()->Run();
 }
 
-TEST_F(BrowserThreadTest, NotReleasedIfTargetThreadNonExistent) {
-  scoped_refptr<NeverDeleted> test(new NeverDeleted());
-}
-
 TEST_F(BrowserThreadTest, PostTaskViaMessageLoopProxy) {
   scoped_refptr<base::MessageLoopProxy> message_loop_proxy =
       BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE);
@@ -133,4 +114,4 @@
   MessageLoop::current()->Run();
 }
 
-}
+}  // namespace content