Remove old diagnostic crash reports.

content/browser/renderer_host/render_view_host_impl.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 "content/browser/renderer_host/render_view_host_impl.h"
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 265 matching lines @@
   DCHECK(GetProcess()->HasConnection());
   DCHECK(GetProcess()->GetBrowserContext());
   CHECK(main_frame_routing_id_ != MSG_ROUTING_NONE ||
         proxy_route_id != MSG_ROUTING_NONE);
 
   // We should not set both main_frame_routing_id_ and proxy_route_id.  Log
   // cases that this happens (without crashing) to track down
   // https://crbug.com/575245.
   // TODO(creis): Remove this once we've found the cause.
   if (main_frame_routing_id_ != MSG_ROUTING_NONE &&
-      proxy_route_id != MSG_ROUTING_NONE)
+      proxy_route_id != MSG_ROUTING_NONE) {
+    NOTREACHED() << "Don't set both main_frame_routing_id_ and proxy_route_id";
     base::debug::DumpWithoutCrashing();
+  }
 
   GetWidget()->set_renderer_initialized(true);
 
   mojom::CreateViewParamsPtr params = mojom::CreateViewParams::New();
   params->renderer_preferences =
       delegate_->GetRendererPrefs(GetProcess()->GetBrowserContext());
   GetPlatformSpecificPrefs(&params->renderer_preferences);
   params->web_preferences = GetWebkitPreferences();
   params->view_id = GetRoutingID();
   params->main_frame_routing_id = main_frame_routing_id_;
@@ skipping 660 matching lines @@
 }
 
 void RenderViewHostImpl::ClosePageTimeout() {
   if (delegate_->ShouldIgnoreUnresponsiveRenderer())
     return;
 
   ClosePageIgnoringUnloadEvents();
 }
 
 }  // namespace content