base: Change DCHECK_IS_ON to a macro DCHECK_IS_ON().

cc/resources/resource_provider.cc

Index: cc/resources/resource_provider.cc
diff --git a/cc/resources/resource_provider.cc b/cc/resources/resource_provider.cc
index 9c2e4a0d1392807d6197b74655cdb09180d92a5a..0518077cbc950eaaa4bfa802ed0a476a500bd500 100644
--- a/cc/resources/resource_provider.cc
+++ b/cc/resources/resource_provider.cc
@@ -1259,14 +1259,14 @@ void ResourceProvider::CleanUpGLIfNeeded() {
   }
 
   DCHECK(gl);
-#if DCHECK_IS_ON
+#if !DCHECK_IS_OFF
   // Check that all GL resources has been deleted.
   for (ResourceMap::const_iterator itr = resources_.begin();
        itr != resources_.end();
        ++itr) {
     DCHECK_NE(GLTexture, itr->second.type);
   }
-#endif  // DCHECK_IS_ON
+#endif  // !DCHECK_IS_OFF
 
   texture_uploader_ = nullptr;
   texture_id_allocator_ = nullptr;