Use timer task runner for V8PerIsolate tasks

net/proxy/proxy_resolver_v8.cc

 // Copyright (c) 2012 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 "net/proxy/proxy_resolver_v8.h"
 
 #include <algorithm>
 #include <cstdio>
 #include <utility>
 
 #include "base/auto_reset.h"
 #include "base/compiler_specific.h"
 #include "base/debug/leak_annotations.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/strings/string_tokenizer.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/synchronization/lock.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "gin/array_buffer.h"
 #include "gin/public/isolate_holder.h"
 #include "gin/v8_initializer.h"
 #include "net/base/ip_address.h"
 #include "net/base/net_errors.h"
 #include "net/proxy/proxy_info.h"
 #include "net/proxy/proxy_resolver_script.h"
 #include "net/proxy/proxy_resolver_script_data.h"
 #include "url/gurl.h"
 #include "url/url_canon.h"
@@ skipping 353 matching lines @@
         v8::V8::SetFlagsFromString(kNoOpt, strlen(kNoOpt));
 
         gin::IsolateHolder::Initialize(
             gin::IsolateHolder::kNonStrictMode,
             gin::IsolateHolder::kStableV8Extras,
             gin::ArrayBufferAllocator::SharedInstance());
 
         has_initialized_v8_ = true;
       }
 
-      holder_.reset(new gin::IsolateHolder(gin::IsolateHolder::kUseLocker));
+      holder_.reset(new gin::IsolateHolder(base::ThreadTaskRunnerHandle::Get(),
+                                           gin::IsolateHolder::kUseLocker));
     }
 
     return holder_->isolate();
   }
 
   v8::Isolate* GetSharedIsolateWithoutCreating() {
     base::AutoLock l(lock_);
     return holder_ ? holder_->isolate() : NULL;
   }
 
@@ skipping 494 matching lines @@
     return 0;
 
   v8::Locker locked(isolate);
   v8::Isolate::Scope isolate_scope(isolate);
   v8::HeapStatistics heap_statistics;
   isolate->GetHeapStatistics(&heap_statistics);
   return heap_statistics.used_heap_size();
 }
 
 }  // namespace net