Support external arrays in Crankshaft

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index 34115337e0402d255c8fac110d7200a8579ba1a5..e14799a24c8c388d2404eba0c4dffb696d5388d9 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -819,9 +819,9 @@ class HGraphBuilder: public AstVisitor {
   HInstruction* BuildLoadKeyedFastElement(HValue* object,
                                           HValue* key,
                                           Property* expr);
-  HInstruction* BuildLoadKeyedPixelArrayElement(HValue* object,
-                                                HValue* key,
-                                                Property* expr);
+  HInstruction* BuildLoadKeyedSpecializedArrayElement(HValue* object,
+                                                      HValue* key,
+                                                      Property* expr);
   HInstruction* BuildLoadKeyedGeneric(HValue* object,
                                       HValue* key);
 
@@ -850,10 +850,11 @@ class HGraphBuilder: public AstVisitor {
                                            HValue* val,
                                            Expression* expr);
 
-  HInstruction* BuildStoreKeyedPixelArrayElement(HValue* object,
-                                                 HValue* key,
-                                                 HValue* val,
-                                                 Expression* expr);
+  HInstruction* BuildStoreKeyedSpecializedArrayElement(
+      HValue* object,
+      HValue* key,
+      HValue* val,
+      Assignment* expr);
 
   HValue* BuildContextChainWalk(Variable* var);