Make first TouchStart and first TouchMove events on a flinging layer non-blocking

third_party/WebKit/Source/platform/PlatformTouchEvent.h

Index: third_party/WebKit/Source/platform/PlatformTouchEvent.h
diff --git a/third_party/WebKit/Source/platform/PlatformTouchEvent.h b/third_party/WebKit/Source/platform/PlatformTouchEvent.h
index 48fabfd5fc21ded176e6f79f7e553180f3b1b1f0..f0e383be4bb856055d1c23e2751bcdca42031e1f 100644
--- a/third_party/WebKit/Source/platform/PlatformTouchEvent.h
+++ b/third_party/WebKit/Source/platform/PlatformTouchEvent.h
@@ -33,6 +33,7 @@ public:
         , m_dispatchType(PlatformEvent::Blocking)
         , m_causesScrollingIfUncanceled(false)
         , m_dispatchedDuringFling(false)
+        , m_touchStartOrFirstTouchMove(false)
     {
     }
 
@@ -42,7 +43,7 @@ public:
     bool cancelable() const { return m_dispatchType == PlatformEvent::Blocking; }
     bool causesScrollingIfUncanceled() const { return m_causesScrollingIfUncanceled; }
     bool dispatchedDuringFling() const { return m_dispatchedDuringFling; }
-
+    bool touchStartOrFirstTouchMove() const { return m_touchStartOrFirstTouchMove; }
     uint32_t uniqueTouchEventId() const { return m_uniqueTouchEventId; }
 
 protected:
@@ -50,7 +51,7 @@ protected:
     DispatchType m_dispatchType;
     bool m_causesScrollingIfUncanceled;
     bool m_dispatchedDuringFling;
-
+    bool m_touchStartOrFirstTouchMove;
     uint32_t m_uniqueTouchEventId;
 };