chrome: Cleanup class/struct forward declarations

chrome/test/chromedriver/chrome/web_view_impl.h

 // Copyright (c) 2013 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 CHROME_TEST_CHROMEDRIVER_CHROME_WEB_VIEW_IMPL_H_
 #define CHROME_TEST_CHROMEDRIVER_CHROME_WEB_VIEW_IMPL_H_
 
 #include <list>
 #include <memory>
 #include <string>
@@ skipping 13 matching lines @@
 struct DeviceMetrics;
 class DevToolsClient;
 class DomTracker;
 class FrameTracker;
 class GeolocationOverrideManager;
 class MobileEmulationOverrideManager;
 class NetworkConditionsOverrideManager;
 class HeapSnapshotTaker;
 struct KeyEvent;
 struct MouseEvent;
-class NavigationTracker;
-class NonBlockingNavigationTracker;
 class PageLoadStrategy;
 class Status;
 
 class WebViewImpl : public WebView {
  public:
   WebViewImpl(const std::string& id,
               const BrowserInfo* browser_info,
               std::unique_ptr<DevToolsClient> client);
   WebViewImpl(const std::string& id,
               const BrowserInfo* browser_info,
@@ skipping 126 matching lines @@
 Status GetNodeIdFromFunction(DevToolsClient* client,
                              int context_id,
                              const std::string& function,
                              const base::ListValue& args,
                              bool* found_node,
                              int* node_id);
 
 }  // namespace internal
 
 #endif  // CHROME_TEST_CHROMEDRIVER_CHROME_WEB_VIEW_IMPL_H_