Revert of PlzNavigate: add dump to understand pdf navigation cancellation

content/browser/frame_host/navigation_request.cc

 // 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.
 
 #include "content/browser/frame_host/navigation_request.h"
 
 #include <utility>
 
-#include "base/debug/dump_without_crashing.h"
 #include "base/memory/ptr_util.h"
 #include "content/browser/appcache/appcache_navigation_handle.h"
 #include "content/browser/appcache/chrome_appcache_service.h"
 #include "content/browser/child_process_security_policy_impl.h"
 #include "content/browser/devtools/render_frame_devtools_agent_host.h"
 #include "content/browser/frame_host/debug_urls.h"
 #include "content/browser/frame_host/frame_tree.h"
 #include "content/browser/frame_host/frame_tree_node.h"
 #include "content/browser/frame_host/navigation_controller_impl.h"
 #include "content/browser/frame_host/navigation_handle_impl.h"
@@ skipping 584 matching lines @@
   // WebUI backend won't find a handler for them. They will be processed in the
   // renderer, however do not discard the pending entry so that the URL bar
   // shows them correctly.
   if (!IsRendererDebugURL(common_params_.url)) {
     frame_tree_node_->navigator()->DiscardPendingEntryIfNeeded(
         navigation_handle_.get());
   }
 
   // If the request was canceled by the user do not show an error page.
   if (net_error == net::ERR_ABORTED) {
-    // TODO(clamy): Remove this once we understand the root cause of
-    // crbug.com/709771.
-    std::string path = common_params_.url.path();
-    if (path.length() >= 4 && path.substr(path.length() - 4) == ".pdf")
-      base::debug::DumpWithoutCrashing();
-
     frame_tree_node_->ResetNavigationRequest(false, true);
     return;
   }
 
   // There are two types of error pages that need to be handled differently.
   // * Error pages resulting from blocking the request, because the original
   //   document wasn't even allowed to make the request. In such case,
   //   the error pages should be committed in the process of the original
   //   document, to avoid creating a process for the destination.
   // * Error pages resulting from either network outage (no network, DNS
@@ skipping 219 matching lines @@
   DCHECK_EQ(request_params_.has_user_gesture, begin_params_.has_user_gesture);
 
   render_frame_host->CommitNavigation(response_.get(), std::move(body_),
                                       std::move(handle_), common_params_,
                                       request_params_, is_view_source_);
 
   frame_tree_node_->ResetNavigationRequest(true, true);
 }
 
 }  // namespace content