Avoid stale navigation requests without excessive page id knowledge in the renderer process.

content/browser/frame_host/render_frame_host_impl.cc

 // Copyright 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.
 
 #include "content/browser/frame_host/render_frame_host_impl.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/containers/hash_tables.h"
 #include "base/lazy_instance.h"
@@ skipping 1239 matching lines @@
     // completing a RFH swap or unload handler.
     SetState(RenderFrameHostImpl::STATE_DEFAULT);
 
     Send(new FrameMsg_Navigate(routing_id_, params));
   }
 
   // Force the throbber to start. We do this because Blink's "started
   // loading" message will be received asynchronously from the UI of the
   // browser. But we want to keep the throbber in sync with what's happening
   // in the UI. For example, we want to start throbbing immediately when the
-  // user naivgates even if the renderer is delayed. There is also an issue
+  // user navigates even if the renderer is delayed. There is also an issue
   // with the throbber starting because the WebUI (which controls whether the
   // favicon is displayed) happens synchronously. If the start loading
   // messages was asynchronous, then the default favicon would flash in.
   //
   // Blink doesn't send throb notifications for JavaScript URLs, so we
   // don't want to either.
   if (!params.common_params.url.SchemeIs(url::kJavaScriptScheme))
     delegate_->DidStartLoading(this, true);
 }
 
@@ skipping 314 matching lines @@
 void RenderFrameHostImpl::DidUseGeolocationPermission() {
   RenderFrameHost* top_frame = frame_tree_node()->frame_tree()->GetMainFrame();
   GetContentClient()->browser()->RegisterPermissionUsage(
       PERMISSION_GEOLOCATION,
       delegate_->GetAsWebContents(),
       GetLastCommittedURL().GetOrigin(),
       top_frame->GetLastCommittedURL().GetOrigin());
 }
 
 }  // namespace content