FBTF: Forward declare everything possible in testing_profile.h

chrome/browser/cocoa/bug_report_window_controller_unittest.mm

 // Copyright (c) 2009 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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/ref_counted.h"
 #import "chrome/browser/cocoa/bug_report_window_controller.h"
+#include "chrome/browser/chrome_thread.h"
 #include "chrome/browser/renderer_host/site_instance.h"
 #include "chrome/browser/renderer_host/test/test_render_view_host.h"
 #include "chrome/browser/tab_contents/test_tab_contents.h"
 #include "chrome/browser/profile.h"
 #import "testing/gtest_mac.h"
 
 namespace {
 
 class BugReportWindowControllerUnittest : public RenderViewHostTestHarness {
 };
@@ skipping 48 matching lines @@
   // that don't refer to a specific page should be available, and the send
   // screenshot option should be turned off.
   EXPECT_EQ([[controller bugTypeList] count], 4U);
   EXPECT_FALSE([controller sendScreenshot]);
 
   [controller release];
 }
 
 }  // namespace