Adding allocator annotations to blink classes and structs.

Source/bindings/core/v8/V8IdleTaskRunner.h

Index: Source/bindings/core/v8/V8IdleTaskRunner.h
diff --git a/Source/bindings/core/v8/V8IdleTaskRunner.h b/Source/bindings/core/v8/V8IdleTaskRunner.h
index 5196755e2ec3866a53a57655858795d928f7cd53..915bfbea41c43d92c8aa5d441259766c53ad08cc 100644
--- a/Source/bindings/core/v8/V8IdleTaskRunner.h
+++ b/Source/bindings/core/v8/V8IdleTaskRunner.h
@@ -37,6 +37,7 @@
 namespace blink {
 
 class V8IdleTaskAdapter : public WebThread::IdleTask {
+    WTF_MAKE_FAST_ALLOCATED(V8IdleTaskAdapter);
     WTF_MAKE_NONCOPYABLE(V8IdleTaskAdapter);
 public:
     V8IdleTaskAdapter(v8::IdleTask* task) : m_task(adoptPtr(task)) { }
@@ -50,6 +51,7 @@ private:
 };
 
 class V8IdleTaskRunner : public gin::V8IdleTaskRunner {
+    WTF_MAKE_FAST_ALLOCATED(V8IdleTaskRunner);
     WTF_MAKE_NONCOPYABLE(V8IdleTaskRunner);
 public:
     V8IdleTaskRunner(WebScheduler* scheduler) : m_scheduler(scheduler) { }