[iOS] ios/web no longer depends on content::BrowserThread.

ios/web/public/test/test_web_thread_bundle.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef IOS_WEB_PUBLIC_TEST_TEST_WEB_THREAD_BUNDLE_H_
 #define IOS_WEB_PUBLIC_TEST_TEST_WEB_THREAD_BUNDLE_H_
 
 // TestWebThreadBundle is a convenience class for creating a set of
 // TestWebThreads in unit tests.  For most tests, it is sufficient to
 // just instantiate the TestWebThreadBundle as a member variable.
@@ skipping 15 matching lines @@
 // again at the point where it would normally be shut down, to better simulate
 // the normal thread shutdown process.
 //
 // Some tests using the IO thread expect a MessageLoopForIO. Passing
 // IO_MAINLOOP will use a MessageLoopForIO for the main MessageLoop.
 // Most of the time, this avoids needing to use a REAL_IO_THREAD.
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 
+namespace base {
+class MessageLoop;
+}
+
 namespace web {
 
-class TestWebThreadBundleImpl;
+class TestWebThread;
 
 class TestWebThreadBundle {
  public:
   // Used to specify the type of MessageLoop that backs the UI thread, and
   // which of the named WebThreads should be backed by a real
   // threads. The UI thread is always the main thread in a unit test.
   enum Options {
     DEFAULT = 0x00,
     IO_MAINLOOP = 0x01,
     REAL_DB_THREAD = 0x02,
     REAL_FILE_THREAD = 0x08,
     REAL_FILE_USER_BLOCKING_THREAD = 0x10,
     REAL_CACHE_THREAD = 0x20,
     REAL_IO_THREAD = 0x40,
   };
 
   TestWebThreadBundle();
   explicit TestWebThreadBundle(int options);
 
   ~TestWebThreadBundle();
 
  private:
-  scoped_ptr<TestWebThreadBundleImpl> impl_;
+  void Init(int options);
+
+  scoped_ptr<base::MessageLoop> message_loop_;
+  scoped_ptr<TestWebThread> ui_thread_;
+  scoped_ptr<TestWebThread> db_thread_;
+  scoped_ptr<TestWebThread> file_thread_;
+  scoped_ptr<TestWebThread> file_user_blocking_thread_;
+  scoped_ptr<TestWebThread> cache_thread_;
+  scoped_ptr<TestWebThread> io_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(TestWebThreadBundle);
 };
 
 }  // namespace web
 
 #endif  // IOS_WEB_PUBLIC_TEST_TEST_WEB_THREAD_BUNDLE_H_