[Touch Adjustment] Pass primary_pointer_type to WebGestureEvent and disable adjustment for stylus

third_party/WebKit/public/platform/WebGestureEvent.h

Index: third_party/WebKit/public/platform/WebGestureEvent.h
diff --git a/third_party/WebKit/public/platform/WebGestureEvent.h b/third_party/WebKit/public/platform/WebGestureEvent.h
index 4cefc3414fbff56fd901ad0531a5c6027fcf9ee3..1dac2aa81fa6e58796acd7de043b98c78f71c074 100644
--- a/third_party/WebKit/public/platform/WebGestureEvent.h
+++ b/third_party/WebKit/public/platform/WebGestureEvent.h
@@ -38,6 +38,10 @@ class WebGestureEvent : public WebInputEvent {
   int global_y;
   WebGestureDevice source_device;
 
+  // |primary_pointer_type| is used to distinguish between finger-generated and
+  // stylus-generated gestures. This is important for touch adjustment.
+  WebPointerProperties::PointerType primary_pointer_type;

[mustaq, 2017/06/14 20:37:48]

Please drop "primary_", there is only one type for an event.

[chongz, 2017/06/14 23:53:23]

dtapuska@ Are you ok with dropping "primary_"?

The original reason is we have |primary_tool_type| in |GestureEventData| and
Dave suggested adding "primary_".

[dtapuska, 2017/06/15 14:47:23]

Probably we should indicate that for a multi-contact gesture this is the pointer
type of the *first* point no?

[chongz, 2017/06/15 21:40:08]

Updated comments.

+
   // If the WebGestureEvent has sourceDevice=WebGestureDeviceTouchscreen, this
   // field contains the unique identifier for the touch event that released
   // this event at TouchDispositionGestureFilter. If the WebGestureEvents was
@@ -164,11 +168,13 @@ class WebGestureEvent : public WebInputEvent {
                       modifiers,
                       time_stamp_seconds),
         source_device(kWebGestureDeviceUninitialized),
+        primary_pointer_type(WebPointerProperties::PointerType::kUnknown),
         resending_plugin_id(-1) {}
 
   WebGestureEvent()
       : WebInputEvent(sizeof(WebGestureEvent)),
         source_device(kWebGestureDeviceUninitialized),
+        primary_pointer_type(WebPointerProperties::PointerType::kUnknown),
         resending_plugin_id(-1) {}
 
 #if INSIDE_BLINK