Revert of Remove enable/disable wheel gestures setting.

content/browser/renderer_host/input/mouse_wheel_event_queue_unittest.cc

 // Copyright 2016 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 "content/browser/renderer_host/input/mouse_wheel_event_queue.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <utility>
@@ skipping 127 matching lines @@
   EXPECT_EQ(WebInputEvent::MouseWheel, event->type);
 
 }  // namespace
 
 class MouseWheelEventQueueTest : public testing::Test,
                                  public MouseWheelEventQueueClient {
  public:
   MouseWheelEventQueueTest()
       : acked_event_count_(0),
         last_acked_event_state_(INPUT_EVENT_ACK_STATE_UNKNOWN) {
-    queue_.reset(new MouseWheelEventQueue(this, kScrollEndTimeoutMs));
+    SetUpForGestureTesting(false);
   }
 
   ~MouseWheelEventQueueTest() override {}
 
   // MouseWheelEventQueueClient
   void SendMouseWheelEventImmediately(
       const MouseWheelEventWithLatencyInfo& event) override {
     WebMouseWheelEvent* cloned_event = new WebMouseWheelEvent();
     std::unique_ptr<WebInputEvent> cloned_event_holder(cloned_event);
     *cloned_event = event.event;
@@ skipping 10 matching lines @@
   }
 
   void OnMouseWheelEventAck(const MouseWheelEventWithLatencyInfo& event,
                             InputEventAckState ack_result) override {
     ++acked_event_count_;
     last_acked_event_ = event.event;
     last_acked_event_state_ = ack_result;
   }
 
  protected:
+  void SetUpForGestureTesting(bool send_gestures) {
+    queue_.reset(
+        new MouseWheelEventQueue(this, send_gestures, kScrollEndTimeoutMs));
+  }
+
   size_t queued_event_count() const { return queue_->queued_size(); }
 
   bool event_in_flight() const { return queue_->event_in_flight(); }
 
   std::vector<std::unique_ptr<WebInputEvent>>& all_sent_events() {
     return sent_events_;
   }
 
   const std::unique_ptr<WebInputEvent>& sent_input_event(size_t index) {
     return sent_events_[index];
@@ skipping 234 matching lines @@
   // Receive an ACK for the second mouse wheel event.
   SendMouseWheelEventAck(INPUT_EVENT_ACK_STATE_CONSUMED);
   EXPECT_EQ(0U, queued_event_count());
   EXPECT_FALSE(event_in_flight());
   EXPECT_EQ(0U, GetAndResetSentEventCount());
   EXPECT_EQ(1U, GetAndResetAckedEventCount());
   EXPECT_EQ(WebInputEvent::MouseWheel, acked_event().type);
 }
 
 TEST_F(MouseWheelEventQueueTest, GestureSending) {
+  SetUpForGestureTesting(true);
   GestureSendingTest(false);
 }
 
 TEST_F(MouseWheelEventQueueTest, GestureSendingPrecisePixels) {
+  SetUpForGestureTesting(true);
   GestureSendingTest(false);
 }
 
 TEST_F(MouseWheelEventQueueTest, GestureSendingWithPhaseInformation) {
+  SetUpForGestureTesting(true);
   PhaseGestureSendingTest(false);
 }
 
 TEST_F(MouseWheelEventQueueTest,
        GestureSendingWithPhaseInformationPrecisePixels) {
+  SetUpForGestureTesting(true);
   PhaseGestureSendingTest(true);
 }
 
 TEST_F(MouseWheelEventQueueTest, GestureSendingInterrupted) {
+  SetUpForGestureTesting(true);
   const WebGestureEvent::ScrollUnits scroll_units = WebGestureEvent::Pixels;
 
   SendMouseWheel(kWheelScrollX, kWheelScrollY, kWheelScrollGlobalX,
                  kWheelScrollGlobalY, 1, 1, 0, false);
   EXPECT_EQ(0U, queued_event_count());
   EXPECT_TRUE(event_in_flight());
   EXPECT_EQ(1U, GetAndResetSentEventCount());
 
   // Receive an ACK for the mouse wheel event.
   SendMouseWheelEventAck(INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
@@ skipping 42 matching lines @@
   EXPECT_FALSE(event_in_flight());
   EXPECT_EQ(WebInputEvent::MouseWheel, acked_event().type);
   EXPECT_EQ(1U, GetAndResetAckedEventCount());
   EXPECT_EQ(2U, all_sent_events().size());
   EXPECT_GESTURE_SCROLL_BEGIN(sent_gesture_event(0));
   EXPECT_GESTURE_SCROLL_UPDATE(sent_gesture_event(1));
   EXPECT_EQ(2U, GetAndResetSentEventCount());
 }
 
 TEST_F(MouseWheelEventQueueTest, GestureRailScrolling) {
+  SetUpForGestureTesting(true);
   const WebGestureEvent::ScrollUnits scroll_units = WebGestureEvent::Pixels;
 
   SendMouseWheel(kWheelScrollX, kWheelScrollY, kWheelScrollGlobalX,
                  kWheelScrollGlobalY, 1, 1, 0, false,
                  WebInputEvent::RailsModeHorizontal);
   EXPECT_EQ(0U, queued_event_count());
   EXPECT_TRUE(event_in_flight());
   EXPECT_EQ(1U, GetAndResetSentEventCount());
 
   // Receive an ACK for the mouse wheel event.
@@ skipping 29 matching lines @@
   EXPECT_EQ(1U, GetAndResetAckedEventCount());
   EXPECT_EQ(2U, all_sent_events().size());
   EXPECT_GESTURE_SCROLL_BEGIN(sent_gesture_event(0));
   EXPECT_GESTURE_SCROLL_UPDATE(sent_gesture_event(1));
   EXPECT_EQ(0U, sent_gesture_event(1)->data.scrollUpdate.deltaX);
   EXPECT_EQ(1U, sent_gesture_event(1)->data.scrollUpdate.deltaY);
   EXPECT_EQ(2U, GetAndResetSentEventCount());
 }
 
 }  // namespace content