Modify gesture event types for WebView-tag scroll bubbling.

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index 1d3f446d1e4acd57d7eb6a03c54d22d081d766d6..2e925397e2b32ec3bc853d7687d9414950067502 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -687,6 +687,7 @@ bool WebViewImpl::handleGestureEvent(const WebGestureEvent& event)
     if (!m_client)
         return false;
 
+
     bool eventSwallowed = false;
     bool eventCancelled = false; // for disambiguation
 
@@ -707,6 +708,12 @@ bool WebViewImpl::handleGestureEvent(const WebGestureEvent& event)
         scheduleAnimation();
         eventSwallowed = true;
 
+        // Plugins may need to see GestureFlingStart to balance
+        // GestureScrollBegin (since the former replaces GestureScrollEnd when
+        // transitioning to a fling).
+        PlatformGestureEventBuilder platformEvent(mainFrameImpl()->frameView(), event);
+        mainFrameImpl()->frame()->eventHandler().handleGestureScrollEvent(platformEvent);
+
         m_client->didHandleGestureEvent(event, eventCancelled);
         return eventSwallowed;
     }
@@ -745,6 +752,7 @@ bool WebViewImpl::handleGestureEvent(const WebGestureEvent& event)
         // Perhaps we could simplify things by rewriting scroll handling to work inner frame
         // out, and then unify with other gesture events.
         eventSwallowed = mainFrameImpl()->frame()->eventHandler().handleGestureScrollEvent(platformEvent);
+        if (event.type == WebInputEvent::GestureFlingStart)

[tdresser, 2015/09/11 15:25:20]

Is the indentation here a little off?

[wjmaclean, 2015/09/11 15:31:01]

Ooops, you're right ... will fix this in the next version.

[wjmaclean, 2015/09/11 15:37:23]

Actually, I don't think this should even be here ... removing ...

         m_client->didHandleGestureEvent(event, eventCancelled);
         return eventSwallowed;
     case WebInputEvent::GesturePinchBegin:
@@ -1864,7 +1872,7 @@ void WebViewImpl::beginFrame(const WebBeginFrameArgs& frameTime)
             PlatformGestureEvent endScrollEvent(PlatformEvent::GestureScrollEnd,
                 m_positionOnFlingStart, m_globalPositionOnFlingStart,
                 IntSize(), 0, false, false, false, false);
-            endScrollEvent.setScrollGestureData(0, 0, 0, 0, true, false);
+            endScrollEvent.setScrollGestureData(0, 0, 0, 0, true, false, 0);
 
             mainFrameImpl()->frame()->eventHandler().handleGestureScrollEnd(endScrollEvent);
         }