components: Cleanup class/struct fwd declarations

components/autofill/content/browser/content_autofill_driver.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 COMPONENTS_AUTOFILL_CONTENT_BROWSER_CONTENT_AUTOFILL_DRIVER_H_
 #define COMPONENTS_AUTOFILL_CONTENT_BROWSER_CONTENT_AUTOFILL_DRIVER_H_
 
 #include <memory>
 #include <string>
 
 #include "base/supports_user_data.h"
 #include "components/autofill/content/common/autofill_agent.mojom.h"
 #include "components/autofill/content/common/autofill_driver.mojom.h"
 #include "components/autofill/core/browser/autofill_driver.h"
 #include "components/autofill/core/browser/autofill_external_delegate.h"
 #include "components/autofill/core/browser/autofill_manager.h"
 #include "mojo/public/cpp/bindings/binding.h"
 
 namespace content {
-class BrowserContext;
 class RenderFrameHost;
 struct FrameNavigateParams;
 struct LoadCommittedDetails;
 }
 
 namespace autofill {
 
 class AutofillClient;
 
 // Class that drives autofill flow in the browser process based on
@@ skipping 100 matching lines @@
   AutofillExternalDelegate autofill_external_delegate_;
 
   mojo::Binding<mojom::AutofillDriver> binding_;
 
   mojom::AutofillAgentPtr autofill_agent_;
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CONTENT_BROWSER_CONTENT_AUTOFILL_DRIVER_H_