Remove some unneeded methods.

In https://crrev.com/0bb413bf71 WillHandleGestureEvent was no longer
needed on the public API.
In https://crrev.com//23748d4a10c7a DidHandleGestureScrollEvent was
no longer needed on the public API.

BUG=1097816

Change-Id: I5981bb76f875bde137aa50c88cb5516d12b7ea02
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2424503
Commit-Queue: Dave Tapuska <dtapuska@chromium.org>
Reviewed-by: danakj <danakj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809988}

third_party/blink/public/web/web_widget_client.h

@@ -69,7 +69,6 @@ struct ImeTextSpan;
 namespace blink {
 class WebDragData;
 class WebMouseEvent;
-class WebGestureEvent;
 struct WebFloatRect;
 class WebWidget;
 class WebLocalFrame;
@@ -202,20 +201,6 @@ class WebWidgetClient {
   // from background inactive to active.
   virtual void RecordTimeToFirstActivePaint(base::TimeDelta duration) {}
 
-  // Returns whether we handled a GestureScrollEvent.
-  virtual void DidHandleGestureScrollEvent(
-      const WebGestureEvent& gesture_event,
-      const gfx::Vector2dF& unused_delta,
-      const cc::OverscrollBehavior& overscroll_behavior,
-      bool event_processed) {}
-
-  // Called before gesture events are processed and allows the
-  // client to handle the event itself. Return true if event was handled
-  // and further processing should stop.
-  virtual bool WillHandleGestureEvent(const WebGestureEvent& event) {
-    return false;
-  }
-
   // Called before mouse events are processed and allows the
   // client to handle the event itself. Return true if event was handled
   // and further processing should stop.

third_party/blink/renderer/core/exported/web_page_popup_impl.cc

@@ -662,7 +662,7 @@ void WebPagePopupImpl::BeginMainFrame(base::TimeTicks last_frame_time) {
 }
 
 bool WebPagePopupImpl::WillHandleGestureEvent(const WebGestureEvent& event) {
-  return WidgetClient()->WillHandleGestureEvent(event);
+  return false;
 }
 
 bool WebPagePopupImpl::WillHandleMouseEvent(const WebMouseEvent& event) {
@@ -674,8 +674,6 @@ void WebPagePopupImpl::ObserveGestureEventAndResult(
     const gfx::Vector2dF& unused_delta,
     const cc::OverscrollBehavior& overscroll_behavior,
     bool event_processed) {
-  WidgetClient()->DidHandleGestureScrollEvent(
-      gesture_event, unused_delta, overscroll_behavior, event_processed);
 }
 
 WebInputEventResult WebPagePopupImpl::HandleCharEvent(

third_party/blink/renderer/core/frame/web_frame_widget_base.cc

@@ -1050,7 +1050,7 @@ bool WebFrameWidgetBase::WillHandleGestureEvent(const WebGestureEvent& event) {
   possible_drag_event_info_.source = ui::mojom::blink::DragEventSource::kTouch;
   possible_drag_event_info_.location =
       gfx::ToFlooredPoint(event.PositionInScreen());
-  return Client()->WillHandleGestureEvent(event);
+  return false;
 }
 
 bool WebFrameWidgetBase::WillHandleMouseEvent(const WebMouseEvent& event) {