[iwyu] runtime.h doesn't need objects.h

src/globals.h

Index: src/globals.h
diff --git a/src/globals.h b/src/globals.h
index 8388757544e7a82ee93c622c53ad7791c643b18e..0a70683b74636e8eadfd9ce707fd42604a65be4a 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -1321,6 +1321,18 @@ enum class DataPropertyInLiteralFlag {
 typedef base::Flags<DataPropertyInLiteralFlag> DataPropertyInLiteralFlags;
 DEFINE_OPERATORS_FOR_FLAGS(DataPropertyInLiteralFlags)
 
+enum ExternalArrayType {
+  kExternalInt8Array = 1,
+  kExternalUint8Array,
+  kExternalInt16Array,
+  kExternalUint16Array,
+  kExternalInt32Array,
+  kExternalUint32Array,
+  kExternalFloat32Array,
+  kExternalFloat64Array,
+  kExternalUint8ClampedArray,
+};
+
 }  // namespace internal
 }  // namespace v8