Remove Navigation Transitions from Chromium

content/browser/frame_host/navigator_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/navigator_impl.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/time/time.h"
 #include "content/browser/frame_host/frame_tree.h"
@@ skipping 99 matching lines @@
 NavigatorDelegate* NavigatorImpl::GetDelegate() {
   return delegate_;
 }
 
 NavigationController* NavigatorImpl::GetController() {
   return controller_;
 }
 
 void NavigatorImpl::DidStartProvisionalLoad(
     RenderFrameHostImpl* render_frame_host,
-    const GURL& url,
-    bool is_transition_navigation) {
+    const GURL& url) {
   bool is_error_page = (url.spec() == kUnreachableWebDataURL);
   bool is_iframe_srcdoc = (url.spec() == kAboutSrcDocURL);
   GURL validated_url(url);
   RenderProcessHost* render_process_host = render_frame_host->GetProcess();
   render_process_host->FilterURL(false, &validated_url);
 
   bool is_main_frame = render_frame_host->frame_tree_node()->IsMainFrame();
   NavigationEntryImpl* pending_entry = controller_->GetPendingEntry();
   if (is_main_frame) {
     // If there is no browser-initiated pending entry for this navigation and it
@@ skipping 17 matching lines @@
       if (pending_entry) {
         entry->set_transferred_global_request_id(
             pending_entry->transferred_global_request_id());
         entry->set_should_replace_entry(pending_entry->should_replace_entry());
         entry->SetRedirectChain(pending_entry->GetRedirectChain());
       }
       controller_->SetPendingEntry(entry);
       if (delegate_)
         delegate_->NotifyChangedNavigationState(content::INVALIDATE_TYPE_URL);
     }
-
-    if (delegate_ && is_transition_navigation)
-      delegate_->DidStartNavigationTransition(render_frame_host);
   }
 
   if (delegate_) {
     // Notify the observer about the start of the provisional load.
     delegate_->DidStartProvisionalLoad(
         render_frame_host, validated_url, is_error_page, is_iframe_srcdoc);
   }
 }
 
 
@@ skipping 724 matching lines @@
         "Navigation.TimeToCommit_ExistingRenderer_BeforeUnloadDiscounted",
         time_to_commit);
     UMA_HISTOGRAM_TIMES(
         "Navigation.TimeToURLJobStart_ExistingRenderer_BeforeUnloadDiscounted",
         time_to_network);
   }
   navigation_data_.reset();
 }
 
 }  // namespace content