Move some Runtime:: functions and remove runtime.h as include when unnecessary.

src/runtime/runtime-utils.h

Index: src/runtime/runtime-utils.h
diff --git a/src/runtime/runtime-utils.h b/src/runtime/runtime-utils.h
index 968ee8ad0c0d60bd64645fb8696cc0ac0d0fcc72..95d75f5084fb2348eabefd0b2b0fe62ffbfd1ffe 100644
--- a/src/runtime/runtime-utils.h
+++ b/src/runtime/runtime-utils.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef V8_RUNTIME_UTILS_H_
-#define V8_RUNTIME_UTILS_H_
+#ifndef V8_RUNTIME_RUNTIME_UTILS_H_
+#define V8_RUNTIME_RUNTIME_UTILS_H_
 
 
 namespace v8 {
@@ -141,10 +141,7 @@ static inline ObjectPair MakePair(Object* x, Object* y) {
 }
 #endif
 
-class JavaScriptFrameIterator;
-
-int FindIndexedNonNativeFrame(JavaScriptFrameIterator* it, int index);
 }
 }  // namespace v8::internal
 
-#endif  // V8_RUNTIME_UTILS_H_
+#endif  // V8_RUNTIME_RUNTIME_UTILS_H_