Remove RenderViewHost parameter from WebContentsObserver::Did{Start|Stop}Loading.

content/browser/web_contents/web_contents_impl_unittest.cc

 // Copyright (c) 2012 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.
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/frame_host/cross_site_transferring_request.h"
 #include "content/browser/frame_host/interstitial_page_impl.h"
 #include "content/browser/frame_host/navigation_entry_impl.h"
@@ skipping 2747 matching lines @@
 }
 
 class LoadingWebContentsObserver : public WebContentsObserver {
  public:
   explicit LoadingWebContentsObserver(WebContents* contents)
       : WebContentsObserver(contents),
         is_loading_(false) {
   }
   ~LoadingWebContentsObserver() override {}
 
-  void DidStartLoading(RenderViewHost* rvh) override {
-    is_loading_ = true;
-  }
-  void DidStopLoading(RenderViewHost* rvh) override {
-    is_loading_ = false;
-  }
+  void DidStartLoading() override { is_loading_ = true; }
+  void DidStopLoading() override { is_loading_ = false; }
 
   bool is_loading() const { return is_loading_; }
 
  private:
   bool is_loading_;
 
   DISALLOW_COPY_AND_ASSIGN(LoadingWebContentsObserver);
 };
 
 // Ensure that DidStartLoading/DidStopLoading events balance out properly with
@@ skipping 322 matching lines @@
   frame->SendBeforeUnloadHandlersPresent(false);
   EXPECT_FALSE(frame->SuddenTerminationAllowed());
   frame->SendBeforeUnloadHandlersPresent(true);
   frame->SendUnloadHandlersPresent(false);
   EXPECT_FALSE(frame->SuddenTerminationAllowed());
   frame->SendBeforeUnloadHandlersPresent(false);
   EXPECT_TRUE(frame->SuddenTerminationAllowed());
 }
 
 }  // namespace content