[es6] Better support for built-ins subclassing.

src/runtime/runtime-typedarray.cc

Index: src/runtime/runtime-typedarray.cc
diff --git a/src/runtime/runtime-typedarray.cc b/src/runtime/runtime-typedarray.cc
index b963868e81c84cc70dffdbf46a14ff0b8b169113..f39e37072d16202254efae172fc6b5a24b1e7111 100644
--- a/src/runtime/runtime-typedarray.cc
+++ b/src/runtime/runtime-typedarray.cc
@@ -164,8 +164,8 @@ RUNTIME_FUNCTION(Runtime_TypedArrayInitialize) {
 
   // All checks are done, now we can modify objects.
 
-  DCHECK(holder->GetInternalFieldCount() ==
-         v8::ArrayBufferView::kInternalFieldCount);
+  DCHECK_EQ(v8::ArrayBufferView::kInternalFieldCount,
+            holder->GetInternalFieldCount());
   for (int i = 0; i < v8::ArrayBufferView::kInternalFieldCount; i++) {
     holder->SetInternalField(i, Smi::FromInt(0));
   }
@@ -238,8 +238,8 @@ RUNTIME_FUNCTION(Runtime_TypedArrayInitializeFromArrayLike) {
   }
   size_t byte_length = length * element_size;
 
-  DCHECK(holder->GetInternalFieldCount() ==
-         v8::ArrayBufferView::kInternalFieldCount);
+  DCHECK_EQ(v8::ArrayBufferView::kInternalFieldCount,
+            holder->GetInternalFieldCount());
   for (int i = 0; i < v8::ArrayBufferView::kInternalFieldCount; i++) {
     holder->SetInternalField(i, Smi::FromInt(0));
   }
@@ -441,8 +441,8 @@ RUNTIME_FUNCTION(Runtime_DataViewInitialize) {
   CONVERT_NUMBER_ARG_HANDLE_CHECKED(byte_offset, 2);
   CONVERT_NUMBER_ARG_HANDLE_CHECKED(byte_length, 3);
 
-  DCHECK(holder->GetInternalFieldCount() ==
-         v8::ArrayBufferView::kInternalFieldCount);
+  DCHECK_EQ(v8::ArrayBufferView::kInternalFieldCount,
+            holder->GetInternalFieldCount());
   for (int i = 0; i < v8::ArrayBufferView::kInternalFieldCount; i++) {
     holder->SetInternalField(i, Smi::FromInt(0));
   }