Add a gyp flag to enable dcheck by default in release without

chrome/test/automation/proxy_launcher.cc

 // Copyright (c) 2011 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/test/automation/proxy_launcher.h"
 
 #include "base/environment.h"
 #include "base/file_util.h"
 #include "base/string_number_conversions.h"
 #include "base/string_split.h"
@@ skipping 62 matching lines @@
 ProxyLauncher::ProxyLauncher()
     : process_(base::kNullProcessHandle),
       process_id_(-1),
       shutdown_type_(WINDOW_CLOSE),
       no_sandbox_(CommandLine::ForCurrentProcess()->HasSwitch(
                       switches::kNoSandbox)),
       full_memory_dump_(CommandLine::ForCurrentProcess()->HasSwitch(
                             switches::kFullMemoryCrashReport)),
       dump_histograms_on_exit_(CommandLine::ForCurrentProcess()->HasSwitch(
                                    switches::kDumpHistogramsOnExit)),
+#if defined(DCHECK_ALWAYS_ON)
+      enable_dcheck_(true),
+#else
       enable_dcheck_(CommandLine::ForCurrentProcess()->HasSwitch(
                          switches::kEnableDCHECK)),
+#endif
       silent_dump_on_dcheck_(CommandLine::ForCurrentProcess()->HasSwitch(
                                  switches::kSilentDumpOnDCHECK)),
       disable_breakpad_(CommandLine::ForCurrentProcess()->HasSwitch(
                             switches::kDisableBreakpad)),
       js_flags_(CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
                     switches::kJavaScriptFlags)),
       log_level_(CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
                      switches::kLoggingLevel)) {
 }
 
@@ skipping 499 matching lines @@
   return LaunchBrowserAndServer(state, wait_for_initial_loads);
 }
 
 void AnonymousProxyLauncher::TerminateConnection() {
   CloseBrowserAndServer();
 }
 
 std::string AnonymousProxyLauncher::PrefixedChannelID() const {
   return channel_id_;
 }