Suppress frame requests in InputMethodController::textInputType()

third_party/WebKit/Source/core/page/PageAnimator.h

Index: third_party/WebKit/Source/core/page/PageAnimator.h
diff --git a/third_party/WebKit/Source/core/page/PageAnimator.h b/third_party/WebKit/Source/core/page/PageAnimator.h
index c2e62ae89d9e3920d98c99caeb788406585ae430..bcadc374280d67678e6531810b1b716b65d5438f 100644
--- a/third_party/WebKit/Source/core/page/PageAnimator.h
+++ b/third_party/WebKit/Source/core/page/PageAnimator.h
@@ -27,13 +27,29 @@ class CORE_EXPORT PageAnimator final : public GarbageCollected<PageAnimator> {
   void updateAllLifecyclePhases(LocalFrame& rootFrame);
   AnimationClock& clock() { return m_animationClock; }
 
+  // TODO(alancutter): Remove the need for this by moving frame request
+  // supression logic up to BeginMainFrame, outside of Blink entirely. This is
+  // exposed as a temporary workaround for a perf regression (crbug.com/704763),
+  // do not use this class outside of PageAnimator.cpp.
+  class FrameRequestSuppressionScope {
+   public:
+    STACK_ALLOCATED();
+    FrameRequestSuppressionScope(PageAnimator*);
+    ~FrameRequestSuppressionScope();
+
+   private:
+    Member<PageAnimator> m_pageAnimator;
+  };
+
  private:
   explicit PageAnimator(Page&);
 
   Member<Page> m_page;
-  bool m_servicingAnimations;
-  bool m_updatingLayoutAndStyleForPainting;
+  bool m_servicingAnimations = false;
+  size_t m_frameRequestSuppressionDepth = 0;
   AnimationClock m_animationClock;
+
+  friend class FrameRequestSuppressionScope;
 };
 
 }  // namespace blink