[runtime] Rewrite Function.prototype.toString in C++.

src/heap/heap.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_HEAP_HEAP_H_
 #define V8_HEAP_HEAP_H_
 
 #include <cmath>
 #include <map>
 
@@ skipping 207 matching lines @@
   V(bool16x8_string, "bool16x8")                                 \
   V(Bool16x8_string, "Bool16x8")                                 \
   V(bool32x4_string, "bool32x4")                                 \
   V(Bool32x4_string, "Bool32x4")                                 \
   V(bool8x16_string, "bool8x16")                                 \
   V(Bool8x16_string, "Bool8x16")                                 \
   V(boolean_string, "boolean")                                   \
   V(Boolean_string, "Boolean")                                   \
   V(byte_length_string, "byteLength")                            \
   V(byte_offset_string, "byteOffset")                            \
+  V(call_string, "call")                                         \
   V(callee_string, "callee")                                     \
   V(caller_string, "caller")                                     \
   V(cell_value_string, "%cell_value")                            \
   V(char_at_string, "CharAt")                                    \
   V(closure_string, "(closure)")                                 \
   V(compare_ic_string, "==")                                     \
   V(configurable_string, "configurable")                         \
   V(constructor_string, "constructor")                           \
   V(construct_string, "construct")                               \
   V(Date_string, "Date")                                         \
@@ skipping 2511 matching lines @@
   DisallowHeapAllocation no_allocation;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_HEAP_H_