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..362d189be0b596725767eeb0c8ac8df94f09a076 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.
     //
@@ -279,22 +281,22 @@ class WebInputEvent {
   static constexpr double kTimeStampForTesting = 123.0;
 
   // Returns true if the WebInputEvent |type| is a mouse event.
-  static bool IsMouseEventType(int type) {
+  static bool IsMouseEventType(WebInputEvent::Type type) {
     return kMouseTypeFirst <= type && type <= kMouseTypeLast;
   }
 
   // Returns true if the WebInputEvent |type| is a keyboard event.
-  static bool IsKeyboardEventType(int type) {
+  static bool IsKeyboardEventType(WebInputEvent::Type type) {
     return kKeyboardTypeFirst <= type && type <= kKeyboardTypeLast;
   }
 
   // Returns true if the WebInputEvent |type| is a touch event.
-  static bool IsTouchEventType(int type) {
+  static bool IsTouchEventType(WebInputEvent::Type type) {
     return kTouchTypeFirst <= type && type <= kTouchTypeLast;
   }
 
   // Returns true if the WebInputEvent is a gesture event.
-  static bool IsGestureEventType(int type) {
+  static bool IsGestureEventType(WebInputEvent::Type type) {
     return kGestureTypeFirst <= type && type <= kGestureTypeLast;
   }
 
@@ -310,6 +312,11 @@ class WebInputEvent {
     return type_ == other.type_;
   }
 
+  // Returns true if the WebInputEvent |type| is a pinch gesture event.
+  static bool IsPinchGestureEventType(WebInputEvent::Type type) {
+    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);