Fixed OSX crash in net::URLFetcherCore::URLFetcherCore

chrome/browser/local_discovery/privet_url_fetcher.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 "chrome/browser/local_discovery/privet_url_fetcher.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
+#include "base/debug/dump_without_crashing.h"
 #include "base/json/json_reader.h"
 #include "base/location.h"
 #include "base/memory/singleton.h"
 #include "base/rand_util.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/stringprintf.h"
 #include "base/thread_task_runner_handle.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/local_discovery/privet_constants.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 184 matching lines @@
 
     url_fetcher_->Start();
   } else {
     delegate_->OnError(this, UNKNOWN_ERROR);
   }
 }
 
 void PrivetURLFetcher::Start() {
   DCHECK_EQ(tries_, 0);  // We haven't called |Start()| yet.
 
+  if (!url_.is_valid()) {
+    // Not yet clear why it's possible. crbug.com/513505
+    base::debug::DumpWithoutCrashing();
+    return delegate_->OnError(this, UNKNOWN_ERROR);
+  }
+
   if (!send_empty_privet_token_ && !v3_mode_) {
     std::string privet_access_token;
     privet_access_token = GetPrivetAccessToken();
     if (privet_access_token.empty()) {
       RequestTokenRefresh();
       return;
     }
   }
 
   Try();
@@ skipping 167 matching lines @@
 }
 
 bool PrivetURLFetcher::PrivetErrorTransient(const std::string& error) {
   return (error == kPrivetErrorDeviceBusy) ||
          (error == kPrivetV3ErrorDeviceBusy) ||
          (error == kPrivetErrorPendingUserAction) ||
          (error == kPrivetErrorPrinterBusy);
 }
 
 }  // namespace local_discovery