Add blink::WebInputEvent::IsPinchGestureEventType().

third_party/WebKit/public/platform/WebInputEvent.h

Index: third_party/WebKit/public/platform/WebInputEvent.h
diff --git a/third_party/WebKit/public/platform/WebInputEvent.h b/third_party/WebKit/public/platform/WebInputEvent.h
index ce3730058b06cdc18835cbe5368fbc4d26216ed8..d49de5874ccd10d262fc7207a790e42026c7c7d4 100644
--- a/third_party/WebKit/public/platform/WebInputEvent.h
+++ b/third_party/WebKit/public/platform/WebInputEvent.h
@@ -130,8 +130,10 @@ class WebInputEvent {
     kGestureFlingCancel,
     // Pinch is two fingers moving closer or farther apart.
     kGesturePinchBegin,
+    kGesturePinchTypeFirst = kGesturePinchBegin,
     kGesturePinchEnd,
     kGesturePinchUpdate,
+    kGesturePinchTypeLast = kGesturePinchUpdate,
 
     // The following types are variations and subevents of single-taps.
     //
@@ -310,6 +312,11 @@ class WebInputEvent {
     return type_ == other.type_;
   }
 
+  // Returns true if the WebInputEvent |type| is a pinch gesture event.
+  static bool IsPinchGestureEventType(int type) {

[dtapuska, 2017/05/08 19:23:19]

can you use WebInputEvent::Type here instead of int?

[Lei Zhang, 2017/05/08 22:50:45]

Done. I fixed the other IsFooType() methods above too.

+    return kGesturePinchTypeFirst <= type && type <= kGesturePinchTypeLast;
+  }
+
   static const char* GetName(WebInputEvent::Type type) {
 #define CASE_TYPE(t)        \
   case WebInputEvent::k##t: \
@@ -402,7 +409,7 @@ class WebInputEvent {
 #endif
   }
 
-  WebInputEvent(unsigned size_param) {
+  explicit WebInputEvent(unsigned size_param) {
     // TODO(dtapuska): Remove this memset when we remove the chrome IPC of this
     // struct.
     memset(this, 0, size_param);