Remove is_fling flag for fling intervention

ui/events/blink/input_handler_proxy.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_EVENTS_BLINK_INPUT_HANDLER_PROXY_H_
 #define UI_EVENTS_BLINK_INPUT_HANDLER_PROXY_H_
 
 #include <memory>
 
 #include "base/containers/hash_tables.h"
@@ skipping 35 matching lines @@
 
   InputScrollElasticityController* scroll_elasticity_controller() {
     return scroll_elasticity_controller_.get();
   }
 
   void set_smooth_scroll_enabled(bool value) { smooth_scroll_enabled_ = value; }
 
   enum EventDisposition {
     DID_HANDLE,
     DID_NOT_HANDLE,
+    DID_NOT_HANDLE_NON_BLOCKING_DUE_TO_FLING,
     DID_HANDLE_NON_BLOCKING,
     DROP_EVENT
   };
   using EventDispositionCallback =
       base::Callback<void(EventDisposition,
                           ScopedWebInputEvent WebInputEvent,
                           const LatencyInfo&,
                           std::unique_ptr<ui::DidOverscrollParams>)>;
   void HandleInputEventWithLatencyInfo(
       ScopedWebInputEvent event,
@@ skipping 160 matching lines @@
   // bundled in the event ack, saving an IPC.  Note that we must continue
   // supporting overscroll IPC notifications due to fling animation updates.
   std::unique_ptr<DidOverscrollParams> current_overscroll_params_;
 
   DISALLOW_COPY_AND_ASSIGN(InputHandlerProxy);
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_BLINK_INPUT_HANDLER_PROXY_H_