remove some calls to to-be-deprecated v8::Value::To* functions

chrome/renderer/benchmarking_extension.cc

 // Copyright (c) 2011 The Chromium 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 "chrome/renderer/benchmarking_extension.h"
 
 #include "base/command_line.h"
 #include "base/metrics/stats_table.h"
 #include "base/time/time.h"
 #include "content/public/common/content_switches.h"
@@ skipping 68 matching lines @@
 
   /*
    * Extract the counter name from arguments.
    */
   static void ExtractCounterName(
       const v8::FunctionCallbackInfo<v8::Value>& args,
       char* name,
       size_t capacity) {
     name[0] = 'c';
     name[1] = ':';
-    args[0]->ToString()->WriteUtf8(&name[2], capacity - 3);
+    args[0]->ToString(args.GetIsolate())->WriteUtf8(&name[2], capacity - 3);
   }
 
   static void GetCounter(const v8::FunctionCallbackInfo<v8::Value>& args) {
     if (!args.Length() || !args[0]->IsString() || !base::StatsTable::current())
       return;
 
     char name[256];
     ExtractCounterName(args, name, sizeof(name));
     int counter = base::StatsTable::current()->GetCounterValue(name);
     args.GetReturnValue().Set(static_cast<int32_t>(counter));
@@ skipping 21 matching lines @@
     args.GetReturnValue().Set(
         static_cast<double>(base::TimeTicks::HighResNow().ToInternalValue()));
   }
 };
 
 v8::Extension* BenchmarkingExtension::Get() {
   return new BenchmarkingWrapper();
 }
 
 }  // namespace extensions_v8