Add DCHECK_GT macro.

src/base/logging.h

Index: src/base/logging.h
diff --git a/src/base/logging.h b/src/base/logging.h
index 511ebf1e9c3e5af344eaaf809fb0726003768fe5..7cc9b3a4063c7c7902335f96c498ec532fde20e2 100644
--- a/src/base/logging.h
+++ b/src/base/logging.h
@@ -153,6 +153,7 @@ void DumpBacktrace();
 #define DCHECK(condition)      CHECK(condition)
 #define DCHECK_EQ(v1, v2)      CHECK_EQ(v1, v2)
 #define DCHECK_NE(v1, v2)      CHECK_NE(v1, v2)
+#define DCHECK_GT(v1, v2)      CHECK_GT(v1, v2)
 #define DCHECK_GE(v1, v2)      CHECK_GE(v1, v2)
 #define DCHECK_LT(v1, v2)      CHECK_LT(v1, v2)
 #define DCHECK_LE(v1, v2)      CHECK_LE(v1, v2)
@@ -163,6 +164,7 @@ void DumpBacktrace();
 #define DCHECK(condition)      ((void) 0)
 #define DCHECK_EQ(v1, v2)      ((void) 0)
 #define DCHECK_NE(v1, v2)      ((void) 0)
+#define DCHECK_GT(v1, v2)      ((void) 0)
 #define DCHECK_GE(v1, v2)      ((void) 0)
 #define DCHECK_LT(v1, v2)      ((void) 0)
 #define DCHECK_LE(v1, v2)      ((void) 0)