Improve FastCloneShallowArray/ObjectStubs with VFP copying on ARM

src/code-stubs.h

Index: src/code-stubs.h
===================================================================
--- src/code-stubs.h	(revision 12502)
+++ src/code-stubs.h	(working copy)
@@ -375,7 +375,7 @@
 class FastCloneShallowArrayStub : public CodeStub {
  public:
   // Maximum length of copied elements array.
-  static const int kMaximumClonedLength = 8;
+  static int MaximumClonedLength();
 
   enum Mode {
     CLONE_ELEMENTS,
@@ -388,7 +388,7 @@
       : mode_(mode),
         length_((mode == COPY_ON_WRITE_ELEMENTS) ? 0 : length) {
     ASSERT_GE(length_, 0);
-    ASSERT_LE(length_, kMaximumClonedLength);
+    ASSERT_LE(length_, MaximumClonedLength());
   }
 
   void Generate(MacroAssembler* masm);
@@ -408,11 +408,11 @@
 class FastCloneShallowObjectStub : public CodeStub {
  public:
   // Maximum number of properties in copied object.
-  static const int kMaximumClonedProperties = 6;
+  static int MaximumClonedProperties();
 
   explicit FastCloneShallowObjectStub(int length) : length_(length) {
     ASSERT_GE(length_, 0);
-    ASSERT_LE(length_, kMaximumClonedProperties);
+    ASSERT_LE(length_, MaximumClonedProperties());
   }
 
   void Generate(MacroAssembler* masm);