Let DCHECK in non-official-release build be opt-in with dcheck_always_on=1 only

chrome/test/automation/proxy_launcher.h

 // 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.
 
 #ifndef CHROME_TEST_AUTOMATION_PROXY_LAUNCHER_H_
 #define CHROME_TEST_AUTOMATION_PROXY_LAUNCHER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 168 matching lines @@
 
   // If true, runs the renderer outside the sandbox.
   bool no_sandbox_;
 
   // If true, write full memory dump during crash.
   bool full_memory_dump_;
 
   // If true, a user is paying attention to the test, so show error dialogs.
   bool show_error_dialogs_;
 
-  // Enable dchecks in release mode.
-  bool enable_dcheck_;
-
   // Dump process memory on dcheck without crashing.
   bool silent_dump_on_dcheck_;
 
   // Disable breakpad on the browser.
   bool disable_breakpad_;
 
   // Flags passed to the JS engine.
   std::string js_flags_;
 
   // Logging level.
@@ skipping 44 matching lines @@
 
  protected:
   std::string channel_id_;      // Channel id of automation proxy.
   bool disconnect_on_failure_;  // True if we disconnect on IPC channel failure.
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AnonymousProxyLauncher);
 };
 
 #endif  // CHROME_TEST_AUTOMATION_PROXY_LAUNCHER_H_