Handle touchpad flings with passive event listeners on compositor thread.

blimp/client/core/input/blimp_input_handler_wrapper.cc

 // Copyright 2015 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.
 
 #include "blimp/client/core/input/blimp_input_handler_wrapper.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
@@ skipping 75 matching lines @@
 }
 
 void BlimpInputHandlerWrapper::TransferActiveWheelFlingAnimation(
     const blink::WebActiveWheelFlingParameters& params) {
   DCHECK(compositor_thread_checker_.CalledOnValidThread());
 
   NOTIMPLEMENTED()
       << "Transferring Fling Animations to the engine is not supported";
 }
 
+void BlimpInputHandlerWrapper::DispatchNonBlockingEventToMainThread(
+    ui::ScopedWebInputEvent event,
+    const ui::LatencyInfo& latency_info) {
+  DCHECK(compositor_thread_checker_.CalledOnValidThread());

[Wez, 2016/09/20 20:24:24]

Let's DCHECK the assumption that this is only handling fling events, which this
code won't be seeing, right?

[dtapuska, 2016/09/20 21:14:01]

Done.

+
+  NOTIMPLEMENTED()
+      << "Dispatching Non Blocking Events to the engine is not supported";
+}
+
 blink::WebGestureCurve* BlimpInputHandlerWrapper::CreateFlingAnimationCurve(
     blink::WebGestureDevice device_source,
     const blink::WebFloatPoint& velocity,
     const blink::WebSize& cumulative_scroll) {
   DCHECK(compositor_thread_checker_.CalledOnValidThread());
 
   return ui::WebGestureCurveImpl::CreateFromDefaultPlatformCurve(
              gfx::Vector2dF(velocity.x, velocity.y),
              gfx::Vector2dF(cumulative_scroll.width, cumulative_scroll.height),
              false /* on_main_thread */)
@@ skipping 27 matching lines @@
   input_handler_proxy_ =
       base::MakeUnique<ui::InputHandlerProxy>(input_handler, this);
   main_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&BlimpInputManager::OnInputHandlerWrapperInitialized,
                  input_manager_weak_ptr_, weak_factory_.GetWeakPtr()));
 }
 
 }  // namespace client
 }  // namespace blimp