[ContextMenu] Shift+F10 should trigger contextmenu on keydown to match system behavior

third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp

Index: third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp b/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
index b5c1dda24e90c95843c812982ca998fafeec7b74..ef9f70f900b3bfe002f3c28b1393310ccb62d128 100644
--- a/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
+++ b/third_party/WebKit/Source/web/WebFrameWidgetImpl.cpp
@@ -1070,16 +1070,18 @@ WebInputEventResult WebFrameWidgetImpl::handleKeyEvent(const WebKeyboardEvent& e
     }
 
 #if !OS(MACOSX)
-    const WebInputEvent::Type contextMenuTriggeringEventType =
+    const WebInputEvent::Type contextMenuKeyTriggeringEventType =
 #if OS(WIN)
         WebInputEvent::KeyUp;
 #else
         WebInputEvent::RawKeyDown;
 #endif
+    const WebInputEvent::Type shiftF10TriggeringEventType = WebInputEvent::RawKeyDown;
 
     bool isUnmodifiedMenuKey = !(event.modifiers & WebInputEvent::InputModifiers) && event.windowsKeyCode == VKEY_APPS;
     bool isShiftF10 = (event.modifiers & WebInputEvent::InputModifiers) == WebInputEvent::ShiftKey && event.windowsKeyCode == VKEY_F10;
-    if ((isUnmodifiedMenuKey || isShiftF10) && event.type == contextMenuTriggeringEventType) {
+    if ((isUnmodifiedMenuKey && event.type == contextMenuKeyTriggeringEventType)
+        || (isShiftF10 && event.type == shiftF10TriggeringEventType)) {
         view()->sendContextMenuEvent(event);
         return WebInputEventResult::HandledSystem;
     }