Remove is_fling flag for fling intervention

blimp/client/core/input/blimp_input_handler_wrapper.cc

Index: blimp/client/core/input/blimp_input_handler_wrapper.cc
diff --git a/blimp/client/core/input/blimp_input_handler_wrapper.cc b/blimp/client/core/input/blimp_input_handler_wrapper.cc
index 33ecdf31bef76657da6d47c6a4fc258a238cebd0..0b18d58a276779cfdaf67f43dda3cb9dd19044b4 100644
--- a/blimp/client/core/input/blimp_input_handler_wrapper.cc
+++ b/blimp/client/core/input/blimp_input_handler_wrapper.cc
@@ -71,6 +71,10 @@ void BlimpInputHandlerWrapper::HandleWebGestureEvent(
     case ui::InputHandlerProxy::EventDisposition::DID_NOT_HANDLE:
       consumed = false;
       break;
+    case ui::InputHandlerProxy::EventDisposition::
+        DID_NOT_HANDLE_NON_BLOCKING_DUE_TO_FLING:
+      NOTREACHED();
+      break;
   }
 
   main_task_runner_->PostTask(
@@ -124,10 +128,6 @@ void BlimpInputHandlerWrapper::DidOverscroll(
   DCHECK(compositor_thread_checker_.CalledOnValidThread());
 }
 
-void BlimpInputHandlerWrapper::DidStartFlinging() {
-  DCHECK(compositor_thread_checker_.CalledOnValidThread());
-}
-
 void BlimpInputHandlerWrapper::DidStopFlinging() {
   DCHECK(compositor_thread_checker_.CalledOnValidThread());
 }