[runtime] Use DCHECK_EQ instead of DCHECK for number of args.

src/runtime/runtime-array.cc

Index: src/runtime/runtime-array.cc
diff --git a/src/runtime/runtime-array.cc b/src/runtime/runtime-array.cc
index 88a1e5e0322085e5a733d6fb992907e464fe0a3e..92bf848829203e5fa2be246e2709a68634428899 100644
--- a/src/runtime/runtime-array.cc
+++ b/src/runtime/runtime-array.cc
@@ -19,7 +19,7 @@ namespace internal {
 
 RUNTIME_FUNCTION(Runtime_FinishArrayPrototypeSetup) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 1);
+  DCHECK_EQ(1, args.length());
   CONVERT_ARG_HANDLE_CHECKED(JSArray, prototype, 0);
   Object* length = prototype->length();
   CHECK(length->IsSmi());
@@ -60,7 +60,7 @@ static void InstallBuiltin(
 
 RUNTIME_FUNCTION(Runtime_SpecialArrayFunctions) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 0);
+  DCHECK_EQ(0, args.length());
   Handle<JSObject> holder =
       isolate->factory()->NewJSObject(isolate->object_function());
 
@@ -85,7 +85,7 @@ RUNTIME_FUNCTION(Runtime_SpecialArrayFunctions) {
 
 RUNTIME_FUNCTION(Runtime_FixedArrayGet) {
   SealHandleScope shs(isolate);
-  DCHECK(args.length() == 2);
+  DCHECK_EQ(2, args.length());
   CONVERT_ARG_CHECKED(FixedArray, object, 0);
   CONVERT_SMI_ARG_CHECKED(index, 1);
   return object->get(index);
@@ -94,7 +94,7 @@ RUNTIME_FUNCTION(Runtime_FixedArrayGet) {
 
 RUNTIME_FUNCTION(Runtime_FixedArraySet) {
   SealHandleScope shs(isolate);
-  DCHECK(args.length() == 3);
+  DCHECK_EQ(3, args.length());
   CONVERT_ARG_CHECKED(FixedArray, object, 0);
   CONVERT_SMI_ARG_CHECKED(index, 1);
   CONVERT_ARG_CHECKED(Object, value, 2);
@@ -122,7 +122,7 @@ RUNTIME_FUNCTION(Runtime_TransitionElementsKind) {
 // Returns -1 if hole removal is not supported by this method.
 RUNTIME_FUNCTION(Runtime_RemoveArrayHoles) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 2);
+  DCHECK_EQ(2, args.length());
   CONVERT_ARG_HANDLE_CHECKED(JSReceiver, object, 0);
   CONVERT_NUMBER_CHECKED(uint32_t, limit, Uint32, args[1]);
   if (object->IsJSProxy()) return Smi::FromInt(-1);
@@ -134,7 +134,7 @@ RUNTIME_FUNCTION(Runtime_RemoveArrayHoles) {
 // Move contents of argument 0 (an array) to argument 1 (an array)
 RUNTIME_FUNCTION(Runtime_MoveArrayContents) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 2);
+  DCHECK_EQ(2, args.length());
   CONVERT_ARG_HANDLE_CHECKED(JSArray, from, 0);
   CONVERT_ARG_HANDLE_CHECKED(JSArray, to, 1);
   JSObject::ValidateElements(from);
@@ -157,7 +157,7 @@ RUNTIME_FUNCTION(Runtime_MoveArrayContents) {
 // How many elements does this object/array have?
 RUNTIME_FUNCTION(Runtime_EstimateNumberOfElements) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 1);
+  DCHECK_EQ(1, args.length());
   CONVERT_ARG_HANDLE_CHECKED(JSArray, array, 0);
   Handle<FixedArrayBase> elements(array->elements(), isolate);
   SealHandleScope shs(isolate);
@@ -200,7 +200,7 @@ RUNTIME_FUNCTION(Runtime_EstimateNumberOfElements) {
 // Intervals can span over some keys that are not in the object.
 RUNTIME_FUNCTION(Runtime_GetArrayKeys) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 2);
+  DCHECK_EQ(2, args.length());
   CONVERT_ARG_HANDLE_CHECKED(JSObject, array, 0);
   CONVERT_NUMBER_CHECKED(uint32_t, length, Uint32, args[1]);
   ElementsKind kind = array->GetElementsKind();
@@ -357,7 +357,7 @@ RUNTIME_FUNCTION(Runtime_NewArray) {
 
 RUNTIME_FUNCTION(Runtime_NormalizeElements) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 1);
+  DCHECK_EQ(1, args.length());
   CONVERT_ARG_HANDLE_CHECKED(JSObject, array, 0);
   CHECK(!array->HasFixedTypedArrayElements());
   CHECK(!array->IsJSGlobalProxy());
@@ -369,7 +369,7 @@ RUNTIME_FUNCTION(Runtime_NormalizeElements) {
 // GrowArrayElements returns a sentinel Smi if the object was normalized.
 RUNTIME_FUNCTION(Runtime_GrowArrayElements) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 2);
+  DCHECK_EQ(2, args.length());
   CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
   CONVERT_NUMBER_CHECKED(int, key, Int32, args[1]);
 
@@ -393,7 +393,7 @@ RUNTIME_FUNCTION(Runtime_GrowArrayElements) {
 
 RUNTIME_FUNCTION(Runtime_HasComplexElements) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 1);
+  DCHECK_EQ(1, args.length());
   CONVERT_ARG_HANDLE_CHECKED(JSObject, array, 0);
   for (PrototypeIterator iter(isolate, array, kStartAtReceiver);
        !iter.IsAtEnd(); iter.Advance()) {
@@ -415,7 +415,7 @@ RUNTIME_FUNCTION(Runtime_HasComplexElements) {
 // ES6 22.1.2.2 Array.isArray
 RUNTIME_FUNCTION(Runtime_ArrayIsArray) {
   HandleScope shs(isolate);
-  DCHECK(args.length() == 1);
+  DCHECK_EQ(1, args.length());
   CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
   Maybe<bool> result = Object::IsArray(object);
   MAYBE_RETURN(result, isolate->heap()->exception());
@@ -424,14 +424,14 @@ RUNTIME_FUNCTION(Runtime_ArrayIsArray) {
 
 RUNTIME_FUNCTION(Runtime_IsArray) {
   SealHandleScope shs(isolate);
-  DCHECK(args.length() == 1);
+  DCHECK_EQ(1, args.length());
   CONVERT_ARG_CHECKED(Object, obj, 0);
   return isolate->heap()->ToBoolean(obj->IsJSArray());
 }
 
 RUNTIME_FUNCTION(Runtime_ArraySpeciesConstructor) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 1);
+  DCHECK_EQ(1, args.length());
   CONVERT_ARG_HANDLE_CHECKED(Object, original_array, 0);
   RETURN_RESULT_OR_FAILURE(
       isolate, Object::ArraySpeciesConstructor(isolate, original_array));
@@ -440,7 +440,7 @@ RUNTIME_FUNCTION(Runtime_ArraySpeciesConstructor) {
 // ES7 22.1.3.11 Array.prototype.includes
 RUNTIME_FUNCTION(Runtime_ArrayIncludes_Slow) {
   HandleScope shs(isolate);
-  DCHECK(args.length() == 3);
+  DCHECK_EQ(3, args.length());
   CONVERT_ARG_HANDLE_CHECKED(Object, search_element, 1);
   CONVERT_ARG_HANDLE_CHECKED(Object, from_index, 2);
 
@@ -532,7 +532,7 @@ RUNTIME_FUNCTION(Runtime_ArrayIncludes_Slow) {
 
 RUNTIME_FUNCTION(Runtime_ArrayIndexOf) {
   HandleScope shs(isolate);
-  DCHECK(args.length() == 3);
+  DCHECK_EQ(3, args.length());
   CONVERT_ARG_HANDLE_CHECKED(Object, search_element, 1);
   CONVERT_ARG_HANDLE_CHECKED(Object, from_index, 2);