revert "SourceEventType added to LatencyInfo."

content/browser/renderer_host/render_widget_host_view_mac_unittest.mm

Index: content/browser/renderer_host/render_widget_host_view_mac_unittest.mm
diff --git a/content/browser/renderer_host/render_widget_host_view_mac_unittest.mm b/content/browser/renderer_host/render_widget_host_view_mac_unittest.mm
index 152ecba43e069782ac0f65d69090d49814f9f22b..f0fccad7008880041e529a279d22fbad89a9b11c 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac_unittest.mm
+++ b/content/browser/renderer_host/render_widget_host_view_mac_unittest.mm
@@ -903,32 +903,6 @@ TEST_F(RenderWidgetHostViewMacTest, LastWheelEventLatencyInfoExists) {
   host->ShutdownAndDestroyWidget(true);
 }
 
-TEST_F(RenderWidgetHostViewMacTest, SourceEventTypeExistsInLatencyInfo) {
-  // 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();
-
-  // Send a wheel event for scrolling by 3 lines.
-  // Verifies that SourceEventType exists in forwarded LatencyInfo object.
-  NSEvent* wheelEvent = MockScrollWheelEventWithPhase(@selector(phaseBegan), 3);
-  [view->cocoa_view() scrollWheel:wheelEvent];
-  ASSERT_TRUE(host->lastWheelEventLatencyInfo.source_event_type() ==
-              ui::SourceEventType::WHEEL);
-
-  // Clean up.
-  host->ShutdownAndDestroyWidget(true);
-}
-
 TEST_F(RenderWidgetHostViewMacTest, ScrollWheelEndEventDelivery) {
   // Initialize the view associated with a MockRenderWidgetHostImpl, rather than
   // the MockRenderProcessHost that is set up by the test harness which mocks