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

src/profiler/profile-generator.cc

 // 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.
 
 #include "src/profiler/profile-generator.h"
 
 #include "src/ast/scopeinfo.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/global-handles.h"
@@ skipping 601 matching lines @@
       if (pc_entry) {
         int pc_offset =
             static_cast<int>(sample.pc - pc_entry->instruction_start());
         src_line = pc_entry->GetSourceLine(pc_offset);
         if (src_line == v8::CpuProfileNode::kNoLineNumberInfo) {
           src_line = pc_entry->line_number();
         }
         src_line_not_found = false;
         *entry++ = pc_entry;
 
-        if (pc_entry->builtin_id() == Builtins::kFunctionCall ||
-            pc_entry->builtin_id() == Builtins::kFunctionApply) {
-          // When current function is FunctionCall or FunctionApply builtin the
-          // top frame is either frame of the calling JS function or internal
-          // frame. In the latter case we know the caller for sure but in the
+        if (pc_entry->builtin_id() == Builtins::kFunctionPrototypeApply ||
+            pc_entry->builtin_id() == Builtins::kFunctionPrototypeCall) {
+          // When current function is either the Function.prototype.apply or the
+          // Function.prototype.call builtin the top frame is either frame of
+          // the calling JS function or internal frame.
+          // In the latter case we know the caller for sure but in the
           // former case we don't so we simply replace the frame with
           // 'unresolved' entry.
           if (sample.top_frame_type == StackFrame::JAVA_SCRIPT) {
             *entry++ = unresolved_entry_;
           }
         }
       }
     }
 
     for (const Address* stack_pos = sample.stack,
@@ skipping 49 matching lines @@
     case EXTERNAL:
       return program_entry_;
     case IDLE:
       return idle_entry_;
     default: return NULL;
   }
 }
 
 }  // namespace internal
 }  // namespace v8