inspector: Replace Timer usages with TaskRunnerTimer in ThreadDebugger

This is part of efforts to replace default timer task runners with
other appropriate task runners in the renderer.

Bug: 624694, 804694
Change-Id: Ia70a8e31394d9d3e6897271a0aa88027824467ef
Reviewed-on: https://chromium-review.googlesource.com/901062
Commit-Queue: Hajime Hoshi <hajimehoshi@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#534666}

third_party/WebKit/Source/core/inspector/ThreadDebugger.cpp

@@ -27,6 +27,7 @@
 #include "core/inspector/V8InspectorString.h"
 #include "core/probe/CoreProbes.h"
 #include "platform/bindings/ScriptForbiddenScope.h"
+#include "platform/scheduler/child/web_scheduler.h"
 #include "platform/wtf/PtrUtil.h"
 #include "platform/wtf/Time.h"
 
@@ -483,9 +484,11 @@ void ThreadDebugger::startRepeatingTimer(
   timer_data_.push_back(data);
   timer_callbacks_.push_back(callback);
 
-  std::unique_ptr<Timer<ThreadDebugger>> timer = WTF::WrapUnique(
-      new Timer<ThreadDebugger>(this, &ThreadDebugger::OnTimer));
-  Timer<ThreadDebugger>* timer_ptr = timer.get();
+  std::unique_ptr<TaskRunnerTimer<ThreadDebugger>> timer =
+      std::make_unique<TaskRunnerTimer<ThreadDebugger>>(
+          Platform::Current()->CurrentThread()->Scheduler()->V8TaskRunner(),
+          this, &ThreadDebugger::OnTimer);
+  TaskRunnerTimer<ThreadDebugger>* timer_ptr = timer.get();
   timers_.push_back(std::move(timer));
   timer_ptr->StartRepeating(TimeDelta::FromSecondsD(interval), FROM_HERE);
 }

third_party/WebKit/Source/core/inspector/ThreadDebugger.h

@@ -111,7 +111,7 @@ class CORE_EXPORT ThreadDebugger : public v8_inspector::V8InspectorClient,
 
   std::unique_ptr<v8_inspector::V8Inspector> v8_inspector_;
   std::unique_ptr<v8::TracingCpuProfiler> v8_tracing_cpu_profiler_;
-  Vector<std::unique_ptr<Timer<ThreadDebugger>>> timers_;
+  Vector<std::unique_ptr<TaskRunnerTimer<ThreadDebugger>>> timers_;
   Vector<v8_inspector::V8InspectorClient::TimerCallback> timer_callbacks_;
   Vector<void*> timer_data_;
   std::unique_ptr<UserGestureIndicator> user_gesture_indicator_;