Revert "Merge arguments branch to bleeding merge."

src/x64/stub-cache-x64.cc

 // Copyright 2011 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 3372 matching lines @@
       __ movss(Operand(rbx, rdi, times_4, 0), xmm0);
       break;
     case JSObject::EXTERNAL_DOUBLE_ELEMENTS:
       // Need to perform int-to-float conversion.
       __ cvtlsi2sd(xmm0, rdx);
       __ movsd(Operand(rbx, rdi, times_8, 0), xmm0);
       break;
     case JSObject::FAST_ELEMENTS:
     case JSObject::FAST_DOUBLE_ELEMENTS:
     case JSObject::DICTIONARY_ELEMENTS:
-    case JSObject::NON_STRICT_ARGUMENTS_ELEMENTS:
       UNREACHABLE();
       break;
   }
   __ ret(0);
 
   // TODO(danno): handle heap number -> pixel array conversion
   if (elements_kind != JSObject::EXTERNAL_PIXEL_ELEMENTS) {
     __ bind(&check_heap_number);
     // rax: value
     // rcx: key (a smi)
@@ skipping 46 matching lines @@
           // 0x8000000000000000, which is zero mod 2^32.
           __ cvttsd2siq(rdx, xmm0);
           __ movl(Operand(rbx, rdi, times_4, 0), rdx);
           break;
         case JSObject::EXTERNAL_PIXEL_ELEMENTS:
         case JSObject::EXTERNAL_FLOAT_ELEMENTS:
         case JSObject::EXTERNAL_DOUBLE_ELEMENTS:
         case JSObject::FAST_ELEMENTS:
         case JSObject::FAST_DOUBLE_ELEMENTS:
         case JSObject::DICTIONARY_ELEMENTS:
-        case JSObject::NON_STRICT_ARGUMENTS_ELEMENTS:
           UNREACHABLE();
           break;
       }
       __ ret(0);
     }
   }
 
   // Slow case: call runtime.
   __ bind(&slow);
 
@@ skipping 112 matching lines @@
       masm->isolate()->builtins()->KeyedStoreIC_MissForceGeneric();
   __ jmp(ic_force_generic, RelocInfo::CODE_TARGET);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64