Handle retry-after-gc failures within LoadIC::Load and StoreIC::Store.

src/runtime.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 676 matching lines @@
 
   // TODO(1240886): Some of the following methods are *not* handle safe, but
   // accept handle arguments. This seems fragile.
 
   // Support getting the characters in a string using [] notation as
   // in Firefox/SpiderMonkey, Safari and Opera.
   MUST_USE_RESULT static MaybeObject* GetElementOrCharAt(Isolate* isolate,
                                                          Handle<Object> object,
                                                          uint32_t index);
 
+  MUST_USE_RESULT static MaybeObject* GetElementOrCharAtOrFail(
+      Isolate* isolate,
+      Handle<Object> object,
+      uint32_t index);
+
   MUST_USE_RESULT static MaybeObject* SetObjectProperty(
       Isolate* isolate,
       Handle<Object> object,
       Handle<Object> key,
       Handle<Object> value,
       PropertyAttributes attr,
       StrictModeFlag strict_mode);
 
   MUST_USE_RESULT static MaybeObject* SetObjectPropertyOrFail(
       Isolate* isolate,
@@ skipping 45 matching lines @@
 //---------------------------------------------------------------------------
 // Constants used by interface to runtime functions.
 
 class DeclareGlobalsEvalFlag:     public BitField<bool,         0, 1> {};
 class DeclareGlobalsNativeFlag:   public BitField<bool,         1, 1> {};
 class DeclareGlobalsLanguageMode: public BitField<LanguageMode, 2, 2> {};
 
 } }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_H_