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

chrome/common/logging_chrome.cc

Index: chrome/common/logging_chrome.cc
===================================================================
--- chrome/common/logging_chrome.cc	(revision 97896)
+++ chrome/common/logging_chrome.cc	(working copy)
@@ -243,10 +243,15 @@
   // Always force a new symlink when redirecting.
   FilePath target_path = SetUpSymlinkIfNeeded(log_path, true);
 
+#if defined(DCHECK_ALWAYS_ON)
   logging::DcheckState dcheck_state =
+      logging::ENABLE_DCHECK_FOR_NON_OFFICIAL_RELEASE_BUILDS
+#else
+  logging::DcheckState dcheck_state =
       command_line.HasSwitch(switches::kEnableDCHECK) ?
       logging::ENABLE_DCHECK_FOR_NON_OFFICIAL_RELEASE_BUILDS :
       logging::DISABLE_DCHECK_FOR_NON_OFFICIAL_RELEASE_BUILDS;
+#endif
 
   // ChromeOS always logs through the symlink, so it shouldn't be
   // deleted if it already exists.
@@ -304,10 +309,15 @@
 #endif
   }
 
+#if defined(DCHECK_ALWAYS_ON)
   logging::DcheckState dcheck_state =
+      logging::ENABLE_DCHECK_FOR_NON_OFFICIAL_RELEASE_BUILDS
+#else
+  logging::DcheckState dcheck_state =
       command_line.HasSwitch(switches::kEnableDCHECK) ?
       logging::ENABLE_DCHECK_FOR_NON_OFFICIAL_RELEASE_BUILDS :
       logging::DISABLE_DCHECK_FOR_NON_OFFICIAL_RELEASE_BUILDS;
+#endif
 
   bool success = InitLogging(log_path.value().c_str(),
                              logging_dest,