Compile FastCloneShallowArrayStub using Crankshaft.

src/arm/code-stubs-arm.h

Index: src/arm/code-stubs-arm.h
diff --git a/src/arm/code-stubs-arm.h b/src/arm/code-stubs-arm.h
index 61ecc975fc1776c3bbea1a4263c074d0a4e675db..fe1fff6131a40eccb860b45a53ab0967c9cf08e3 100644
--- a/src/arm/code-stubs-arm.h
+++ b/src/arm/code-stubs-arm.h
@@ -61,11 +61,13 @@ class TranscendentalCacheStub: public PlatformCodeStub {
 class StoreBufferOverflowStub: public PlatformCodeStub {
  public:
   explicit StoreBufferOverflowStub(SaveFPRegsMode save_fp)
-      : save_doubles_(save_fp) { }
+      : save_doubles_(save_fp) {
+    ASSERT(CpuFeatures::IsSafeForSnapshot(VFP2) || save_fp == kDontSaveFPRegs);
+  }
 
   void Generate(MacroAssembler* masm);
 
-  virtual bool IsPregenerated();
+  virtual bool IsPregenerated() { return true; }
   static void GenerateFixedRegStubsAheadOfTime(Isolate* isolate);
   virtual bool SometimesSetsUpAFrame() { return false; }