Add support for enabling DCHECKs in release mode

src/objects-debug.cc

Index: src/objects-debug.cc
diff --git a/src/objects-debug.cc b/src/objects-debug.cc
index b24d5def04945628e11a83720a39a1c57c96d6fd..82c34020a69ac565b1c423c9b4adcdd267450fef 100644
--- a/src/objects-debug.cc
+++ b/src/objects-debug.cc
@@ -1069,7 +1069,7 @@ void BreakPointInfo::BreakPointInfoVerify() {
 }
 #endif  // VERIFY_HEAP
 
-#ifdef DEBUG
+#if DCHECK_IS_ON
 
 void JSObject::IncrementSpillStatistics(SpillInformation* info) {
   info->number_of_objects_++;
@@ -1174,15 +1174,19 @@ bool DescriptorArray::IsSortedNoDuplicates(int valid_entries) {
   for (int i = 0; i < number_of_descriptors(); i++) {
     Name* key = GetSortedKey(i);
     if (key == current_key) {
+#ifdef OBJECT_PRINT
       OFStream os(stdout);
       PrintDescriptors(os);
+#endif
       return false;
     }
     current_key = key;
     uint32_t hash = GetSortedKey(i)->Hash();
     if (hash < current) {
+#ifdef OBJECT_PRINT
       OFStream os(stdout);
       PrintDescriptors(os);
+#endif
       return false;
     }
     current = hash;
@@ -1191,6 +1195,7 @@ bool DescriptorArray::IsSortedNoDuplicates(int valid_entries) {
 }
 
 
+#ifdef ENABLE_SLOW_DCHECKS
 bool LayoutDescriptor::IsConsistentWithMap(Map* map) {
   if (FLAG_unbox_double_fields) {
     DescriptorArray* descriptors = map->instance_descriptors();
@@ -1210,6 +1215,7 @@ bool LayoutDescriptor::IsConsistentWithMap(Map* map) {
   }
   return true;
 }
+#endif
 
 
 bool TransitionArray::IsSortedNoDuplicates(int valid_entries) {
@@ -1219,15 +1225,19 @@ bool TransitionArray::IsSortedNoDuplicates(int valid_entries) {
   for (int i = 0; i < number_of_transitions(); i++) {
     Name* key = GetSortedKey(i);
     if (key == current_key) {
+#ifdef OBJECT_PRINT
       OFStream os(stdout);
       PrintTransitions(os);
+#endif
       return false;
     }
     current_key = key;
     uint32_t hash = GetSortedKey(i)->Hash();
     if (hash < current) {
+#ifdef OBJECT_PRINT
       OFStream os(stdout);
       PrintTransitions(os);
+#endif
       return false;
     }
     current = hash;
@@ -1248,6 +1258,9 @@ bool TransitionArray::IsConsistentWithBackPointers(Map* current_map) {
   return true;
 }
 
+#endif  // DCHECK_IS_ON
+
+#ifdef DEBUG
 
 void Code::VerifyEmbeddedObjectsInFullCode() {
   // Check that no context-specific object has been embedded.
@@ -1266,7 +1279,6 @@ void Code::VerifyEmbeddedObjectsInFullCode() {
   }
 }
 
-
 #endif  // DEBUG
 
 } }  // namespace v8::internal