Always try to inline certain core library functions.

runtime/vm/intermediate_language.h

Index: runtime/vm/intermediate_language.h
===================================================================
--- runtime/vm/intermediate_language.h	(revision 25008)
+++ runtime/vm/intermediate_language.h	(working copy)
@@ -121,6 +121,11 @@
   V(_Uint32x4, _toFloat32x4, Uint32x4ToUint32x4, 912844231)                    \
 
 
+// A list of core function that should always be inlined.
+#define INLINE_WHITE_LIST(V)                                                   \
+  V(ListIterator, moveNext, ListIteratorMoveNext, 203118278)                   \
+  V(_GrowableObjectArray, get:iterator, GrowableArrayIterator, 810824939)
+
 // Class that recognizes the name and owner of a function and returns the
 // corresponding enum. See RECOGNIZED_LIST above for list of recognizable
 // functions.
@@ -134,6 +139,7 @@
   };
 
   static Kind RecognizeKind(const Function& function);
+  static bool AlwaysInline(const Function& function);
   static const char* KindToCString(Kind kind);
 };