Adding back Mouse Focus on |sendContextMenuEventForGesture|

third_party/WebKit/Source/core/input/GestureManager.cpp

Index: third_party/WebKit/Source/core/input/GestureManager.cpp
diff --git a/third_party/WebKit/Source/core/input/GestureManager.cpp b/third_party/WebKit/Source/core/input/GestureManager.cpp
index e3ee248d3de3f43ed00f84fbe3ad602c79ef69d5..a5d589e5baf1aef5a03c2f4687c9bf225cb81542 100644
--- a/third_party/WebKit/Source/core/input/GestureManager.cpp
+++ b/third_party/WebKit/Source/core/input/GestureManager.cpp
@@ -375,6 +375,17 @@ WebInputEventResult GestureManager::sendContextMenuEventForGesture(
       PlatformMouseEvent::FromTouch, WTF::monotonicallyIncreasingTime(),
       WebPointerProperties::PointerType::Mouse);
 
+  if (!m_suppressMouseEventsFromGestures && m_frame->view()) {
+    HitTestRequest request(HitTestRequest::Active);
+    LayoutPoint documentPoint =
+        m_frame->view()->rootFrameToContents(targetedEvent.event().position());
+    MouseEventWithHitTestResults mev =
+        m_frame->document()->performMouseEventHitTest(request, documentPoint,
+                                                      mouseEvent);
+    m_mouseEventManager->handleMouseFocus(
+        mev.hitTestResult(),
+        InputDeviceCapabilities::firesTouchEventsSourceCapabilities());
+  }
   return m_frame->eventHandler().sendContextMenuEvent(mouseEvent);
 }