Revert of Add a NavigationThrottle to the public content/ interface

components/navigation_interception/intercept_navigation_throttle.h

Index: components/navigation_interception/intercept_navigation_throttle.h
diff --git a/components/navigation_interception/intercept_navigation_throttle.h b/components/navigation_interception/intercept_navigation_throttle.h
deleted file mode 100644
index 0b7f74605378266e5e09a549127d53639e1617a4..0000000000000000000000000000000000000000
--- a/components/navigation_interception/intercept_navigation_throttle.h
+++ /dev/null
@@ -1,51 +0,0 @@
-// Copyright 2015 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 COMPONENTS_NAVIGATION_INTERCEPTION_INTERCEPT_NAVIGATION_THROTTLE_H_
-#define COMPONENTS_NAVIGATION_INTERCEPTION_INTERCEPT_NAVIGATION_THROTTLE_H_
-
-#include <string>
-
-#include "base/callback.h"
-#include "base/memory/weak_ptr.h"
-#include "content/public/browser/navigation_throttle.h"
-
-class GURL;
-
-namespace content {
-class NavigationHandle;
-class WebContents;
-}
-
-namespace navigation_interception {
-
-class NavigationParams;
-
-// This class allows the provider of the Callback to selectively ignore top
-// level navigations. This is a UI thread class.
-class InterceptNavigationThrottle : public content::NavigationThrottle {
- public:
-  typedef base::Callback<bool(content::WebContents* /* source */,
-                              const NavigationParams& /* navigation_params */)>
-      CheckCallback;
-
-  InterceptNavigationThrottle(content::NavigationHandle* navigation_handle,
-                              CheckCallback should_ignore_callback);
-  ~InterceptNavigationThrottle() override;
-
-  // content::NavigationThrottle implementation:
-  ThrottleCheckResult WillStartRequest() override;
-  ThrottleCheckResult WillRedirectRequest() override;
-
- private:
-  ThrottleCheckResult CheckIfShouldIgnoreNavigation(bool is_redirect);
-
-  CheckCallback should_ignore_callback_;
-
-  DISALLOW_COPY_AND_ASSIGN(InterceptNavigationThrottle);
-};
-
-}  // namespace navigation_interception
-
-#endif  // COMPONENTS_NAVIGATION_INTERCEPTION_INTERCEPT_NAVIGATION_THROTTLE_H_