Enable DVLOG on non official release build based on the parameter passed for InitLogging.

base/base_switches.h

Index: base/base_switches.h
diff --git a/base/base_switches.h b/base/base_switches.h
index 4645a2f78595a961bebec150a332146ac71822aa..13bf90acef45817104e92a2b0c77d2208696dc7e 100644
--- a/base/base_switches.h
+++ b/base/base_switches.h
@@ -13,6 +13,7 @@ namespace switches {
 extern const char kDebugOnStart[];
 extern const char kDisableBreakpad[];
 extern const char kEnableDCHECK[];
+extern const char kEnableDLOG[];
 extern const char kFullMemoryCrashReport[];
 extern const char kNoErrorDialogs[];
 extern const char kNoMessageBox[];