[runtime] Add %ToString and %_ToString and remove the TO_STRING builtin.

src/full-codegen/full-codegen.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_FULL_CODEGEN_FULL_CODEGEN_H_
 #define V8_FULL_CODEGEN_FULL_CODEGEN_H_
 
 #include "src/allocation.h"
 #include "src/assert-scope.h"
 #include "src/ast.h"
@@ skipping 509 matching lines @@
   F(GeneratorThrow)                       \
   F(DebugBreakInOptimizedCode)            \
   F(ClassOf)                              \
   F(StringCharCodeAt)                     \
   F(StringAdd)                            \
   F(SubString)                            \
   F(StringCompare)                        \
   F(RegExpExec)                           \
   F(RegExpConstructResult)                \
   F(NumberToString)                       \
+  F(ToString)                             \
+  F(ToName)                               \
   F(ToObject)                             \
   F(DebugIsActive)
 
 #define GENERATOR_DECLARATION(Name) void Emit##Name(CallRuntime* call);
   FOR_EACH_FULL_CODE_INTRINSIC(GENERATOR_DECLARATION)
 #undef GENERATOR_DECLARATION
 
   // Platform-specific code for resuming generators.
   void EmitGeneratorResume(Expression *generator,
                            Expression *value,
@@ skipping 537 matching lines @@
 
   Address start_;
   Address instruction_start_;
   uint32_t length_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_FULL_CODEGEN_FULL_CODEGEN_H_