Move Arrays, Collections and Maps into a new library, dart:collections.

runtime/vm/object.h

Index: runtime/vm/object.h
diff --git a/runtime/vm/object.h b/runtime/vm/object.h
index 30e7c804e79368b09666e01fecb0195d0ad36c08..e045ca7650ec01f534451c3e53f859f026f1596c 100644
--- a/runtime/vm/object.h
+++ b/runtime/vm/object.h
@@ -1909,6 +1909,7 @@ class Library : public Object {
   static bool IsKeyUsed(intptr_t key);
 
   static void InitCoreLibrary(Isolate* isolate);
+  static void InitCollectionsLibrary(Isolate* isolate);
   static void InitMathLibrary(Isolate* isolate);
   static void InitIsolateLibrary(Isolate* isolate);
   static void InitMirrorsLibrary(Isolate* isolate);
@@ -1917,6 +1918,7 @@ class Library : public Object {
 
   static RawLibrary* CoreLibrary();
   static RawLibrary* CoreImplLibrary();
+  static RawLibrary* CollectionsLibrary();
   static RawLibrary* MathLibrary();
   static RawLibrary* IsolateLibrary();
   static RawLibrary* MirrorsLibrary();