Revert r15419: "Generate StoreGlobal stubs with Hydrogen"

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index 3d37809bf0be19601beeab9d84d8a552b7ad6d0e..8be784074481c1dc0083b34b7443ced084eb7417 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -333,8 +333,6 @@ class HGraph: public ZoneObject {
   HConstant* GetConstantNull();
   HConstant* GetInvalidContext();
 
-  bool IsStandardConstant(HConstant* constant);
-
   HBasicBlock* CreateBasicBlock();
   HArgumentsObject* GetArgumentsObject() const {
     return arguments_object_.get();
@@ -1494,12 +1492,7 @@ class HOptimizedGraphBuilder: public HGraphBuilder, public AstVisitor {
 
   bool inline_bailout() { return inline_bailout_; }
 
-  enum SoftDeoptimizeMode {
-    MUST_EMIT_SOFT_DEOPT,
-    CAN_OMIT_SOFT_DEOPT
-  };
-
-  void AddSoftDeoptimize(SoftDeoptimizeMode mode = CAN_OMIT_SOFT_DEOPT);
+  void AddSoftDeoptimize();
 
   void Bailout(const char* reason);