Remove enable/disable wheel gestures setting.

content/browser/renderer_host/render_widget_host_view_mac_unittest.mm

 // Copyright (c) 2012 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/render_widget_host_view_mac.h"
 
 #include <Cocoa/Cocoa.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <tuple>
@@ skipping 248 matching lines @@
     RecycleAndWait();
 
     // See comment in SetUp().
     test_rvh()->GetWidget()->SetView(
         static_cast<RenderWidgetHostViewBase*>(old_rwhv_));
 
     ImageTransportFactory::Terminate();
     RenderViewHostImplTestHarness::TearDown();
   }
 
-  void SetupForWheelGestures(bool enable_wheel_gestures) {
-    CHECK(!base::CommandLine::ForCurrentProcess()->HasSwitch(
-        switches::kDisableWheelGestures));
-    CHECK(!base::CommandLine::ForCurrentProcess()->HasSwitch(
-        switches::kEnableWheelGestures));
-    base::CommandLine::ForCurrentProcess()->AppendSwitch(
-        enable_wheel_gestures ? switches::kEnableWheelGestures
-                              : switches::kDisableWheelGestures);
-    // Owned by its |cocoa_view()|, i.e. |rwhv_cocoa_|.
-    rwhv_mac_ = new RenderWidgetHostViewMac(rvh()->GetWidget(), false);
-    rwhv_cocoa_.reset([rwhv_mac_->cocoa_view() retain]);
-  }
-
   void RecycleAndWait() {
     pool_.Recycle();
     base::MessageLoop::current()->RunUntilIdle();
     pool_.Recycle();
   }
 
   void DestroyHostViewRetainCocoaView() {
     test_rvh()->GetWidget()->SetView(nullptr);
     rwhv_mac_->Destroy();
   }
@@ skipping 634 matching lines @@
   // render view receives it.
   NSEvent* event2 = MockScrollWheelEventWithPhase(@selector(phaseEnded), 0);
   [NSApp postEvent:event2 atStart:NO];
   base::MessageLoop::current()->RunUntilIdle();
   ASSERT_EQ(2U, process_host->sink().message_count());
 
   // Clean up.
   host->ShutdownAndDestroyWidget(true);
 }
 
-TEST_F(RenderWidgetHostViewMacTest, IgnoreEmptyUnhandledWheelEvent) {
-  SetupForWheelGestures(false);
-
-  // Initialize the view associated with a MockRenderWidgetHostImpl, rather than
-  // the MockRenderProcessHost that is set up by the test harness which mocks
-  // out |OnMessageReceived()|.
-  TestBrowserContext browser_context;
-  MockRenderProcessHost* process_host =
-      new MockRenderProcessHost(&browser_context);
-  process_host->Init();
-  MockRenderWidgetHostDelegate delegate;
-  int32_t routing_id = process_host->GetNextRoutingID();
-  MockRenderWidgetHostImpl* host =
-      new MockRenderWidgetHostImpl(&delegate, process_host, routing_id);
-  RenderWidgetHostViewMac* view = new RenderWidgetHostViewMac(host, false);
-  process_host->sink().ClearMessages();
-
-  // Add a delegate to the view.
-  base::scoped_nsobject<MockRenderWidgetHostViewMacDelegate> view_delegate(
-      [[MockRenderWidgetHostViewMacDelegate alloc] init]);
-  view->SetDelegate(view_delegate.get());
-
-  // Send an initial wheel event for scrolling by 3 lines.
-  NSEvent* event1 = MockScrollWheelEventWithPhase(@selector(phaseBegan), 3);
-  [view->cocoa_view() scrollWheel:event1];
-  ASSERT_EQ(1U, process_host->sink().message_count());
-  process_host->sink().ClearMessages();
-
-  // Indicate that the wheel event was unhandled.
-  InputEventAck unhandled_ack(blink::WebInputEvent::MouseWheel,
-                              INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
-  std::unique_ptr<IPC::Message> response1(
-      new InputHostMsg_HandleInputEvent_ACK(0, unhandled_ack));
-  host->OnMessageReceived(*response1);
-
-  // Check that the view delegate got an unhandled wheel event.
-  ASSERT_EQ(YES, view_delegate.get().unhandledWheelEventReceived);
-  view_delegate.get().unhandledWheelEventReceived = NO;
-
-  // Send another wheel event, this time for scrolling by 0 lines (empty event).
-  NSEvent* event2 = MockScrollWheelEventWithPhase(@selector(phaseChanged), 0);
-  [view->cocoa_view() scrollWheel:event2];
-  ASSERT_EQ(1U, process_host->sink().message_count());
-
-  // Indicate that the wheel event was also unhandled.
-  std::unique_ptr<IPC::Message> response2(
-      new InputHostMsg_HandleInputEvent_ACK(0, unhandled_ack));
-  host->OnMessageReceived(*response2);
-
-  // Check that the view delegate ignored the empty unhandled wheel event.
-  ASSERT_EQ(NO, view_delegate.get().unhandledWheelEventReceived);
-
-  // Clean up.
-  host->ShutdownAndDestroyWidget(true);
-}
-
 TEST_F(RenderWidgetHostViewMacTest,
        IgnoreEmptyUnhandledWheelEventWithWheelGestures) {
-  SetupForWheelGestures(true);
-
   // Initialize the view associated with a MockRenderWidgetHostImpl, rather than
   // the MockRenderProcessHost that is set up by the test harness which mocks
   // out |OnMessageReceived()|.
   TestBrowserContext browser_context;
   MockRenderProcessHost* process_host =
       new MockRenderProcessHost(&browser_context);
   process_host->Init();
   MockRenderWidgetHostDelegate delegate;
   int32_t routing_id = process_host->GetNextRoutingID();
   MockRenderWidgetHostImpl* host =
@@ skipping 306 matching lines @@
   // Verify that Event.Latency.OS.MOUSE_WHEEL histogram is computed properly.
   NSEvent* wheelEvent = MockScrollWheelEventWithPhase(@selector(phaseBegan),3);
   [view->cocoa_view() scrollWheel:wheelEvent];
   histogram_tester.ExpectTotalCount("Event.Latency.OS.MOUSE_WHEEL", 1);
 
   // Clean up.
   host->ShutdownAndDestroyWidget(true);
 }
 
 }  // namespace content