Return a enumeration of the state of handling of InputEvents.

third_party/WebKit/Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 619 matching lines @@
     PageWidgetEventHandler::handleMouseUp(mainFrame, event);
 
     if (page()->settings().showContextMenuOnMouseUp()) {
         // Dispatch the contextmenu event regardless of if the click was swallowed.
         // On Mac/Linux, we handle it on mouse down, not up.
         if (event.button == WebMouseEvent::ButtonRight)
             mouseContextMenu(event);
     }
 }
 
-bool WebViewImpl::handleMouseWheel(LocalFrame& mainFrame, const WebMouseWheelEvent& event)
+WebInputEventResult WebViewImpl::handleMouseWheel(LocalFrame& mainFrame, const WebMouseWheelEvent& event)
 {
     hidePopups();
     return PageWidgetEventHandler::handleMouseWheel(mainFrame, event);
 }
 
 bool WebViewImpl::scrollBy(const WebFloatSize& delta, const WebFloatSize& velocity)
 {
     ASSERT(m_flingSourceDevice != WebGestureDeviceUninitialized);
     if (m_flingSourceDevice == WebGestureDeviceTouchpad) {
         WebMouseWheelEvent syntheticWheel;
         const float tickDivisor = WheelEvent::TickMultiplier;
 
         syntheticWheel.deltaX = delta.width;
         syntheticWheel.deltaY = delta.height;
         syntheticWheel.wheelTicksX = delta.width / tickDivisor;
         syntheticWheel.wheelTicksY = delta.height / tickDivisor;
         syntheticWheel.hasPreciseScrollingDeltas = true;
         syntheticWheel.x = m_positionOnFlingStart.x;
         syntheticWheel.y = m_positionOnFlingStart.y;
         syntheticWheel.globalX = m_globalPositionOnFlingStart.x;
         syntheticWheel.globalY = m_globalPositionOnFlingStart.y;
         syntheticWheel.modifiers = m_flingModifier;
 
         if (m_page && m_page->mainFrame() && m_page->mainFrame()->isLocalFrame() && m_page->deprecatedLocalMainFrame()->view())
-            return handleMouseWheel(*m_page->deprecatedLocalMainFrame(), syntheticWheel);
+            return handleMouseWheel(*m_page->deprecatedLocalMainFrame(), syntheticWheel) != WebInputEventResult::NotHandled;
     } else {
         WebGestureEvent syntheticGestureEvent;
 
         syntheticGestureEvent.type = WebInputEvent::GestureScrollUpdate;
         syntheticGestureEvent.data.scrollUpdate.preventPropagation = true;
         syntheticGestureEvent.data.scrollUpdate.deltaX = delta.width;
         syntheticGestureEvent.data.scrollUpdate.deltaY = delta.height;
         syntheticGestureEvent.data.scrollUpdate.velocityX = velocity.width;
         syntheticGestureEvent.data.scrollUpdate.velocityY = velocity.height;
         syntheticGestureEvent.x = m_positionOnFlingStart.x;
         syntheticGestureEvent.y = m_positionOnFlingStart.y;
         syntheticGestureEvent.globalX = m_globalPositionOnFlingStart.x;
         syntheticGestureEvent.globalY = m_globalPositionOnFlingStart.y;
         syntheticGestureEvent.modifiers = m_flingModifier;
         syntheticGestureEvent.sourceDevice = WebGestureDeviceTouchscreen;
         syntheticGestureEvent.data.scrollUpdate.inertial = true;
 
         if (m_page && m_page->mainFrame() && m_page->mainFrame()->isLocalFrame() && m_page->deprecatedLocalMainFrame()->view())
-            return handleGestureEvent(syntheticGestureEvent);
+            return handleGestureEvent(syntheticGestureEvent) != WebInputEventResult::NotHandled;
     }
     return false;
 }
 
-bool WebViewImpl::handleGestureEvent(const WebGestureEvent& event)
+WebInputEventResult WebViewImpl::handleGestureEvent(const WebGestureEvent& event)
 {
     if (!m_client)
-        return false;
+        return WebInputEventResult::NotHandled;
 
-    bool eventSwallowed = false;
+    WebInputEventResult eventResult = WebInputEventResult::NotHandled;
     bool eventCancelled = false; // for disambiguation
 
     // Special handling for slow-path fling gestures.
     switch (event.type) {
     case WebInputEvent::GestureFlingStart: {
         if (mainFrameImpl()->frame()->eventHandler().isScrollbarHandlingGestures())
             break;
         endActiveFlingAnimation();
         m_client->cancelScheduledContentIntents();
         m_positionOnFlingStart = WebPoint(event.x, event.y);
         m_globalPositionOnFlingStart = WebPoint(event.globalX, event.globalY);
         m_flingModifier = event.modifiers;
         m_flingSourceDevice = event.sourceDevice;
         ASSERT(m_flingSourceDevice != WebGestureDeviceUninitialized);
         OwnPtr<WebGestureCurve> flingCurve = adoptPtr(Platform::current()->createFlingAnimationCurve(event.sourceDevice, WebFloatPoint(event.data.flingStart.velocityX, event.data.flingStart.velocityY), WebSize()));
         ASSERT(flingCurve);
         m_gestureAnimation = WebActiveGestureAnimation::createAtAnimationStart(flingCurve.release(), this);
         scheduleAnimation();
-        eventSwallowed = true;
+        eventResult = WebInputEventResult::HandledSystem;
 
         // Plugins may need to see GestureFlingStart to balance
         // GestureScrollBegin (since the former replaces GestureScrollEnd when
         // transitioning to a fling).
         PlatformGestureEventBuilder platformEvent(mainFrameImpl()->frameView(), event);
+        // TODO(dtapuska): Why isn't the response used?
         mainFrameImpl()->frame()->eventHandler().handleGestureScrollEvent(platformEvent);
 
         m_client->didHandleGestureEvent(event, eventCancelled);
-        return eventSwallowed;
+        return WebInputEventResult::HandledSystem;
     }
     case WebInputEvent::GestureFlingCancel:
         if (endActiveFlingAnimation())
-            eventSwallowed = true;
+            eventResult = WebInputEventResult::HandledSuppressed;
 
         m_client->didHandleGestureEvent(event, eventCancelled);
-        return eventSwallowed;
+        return eventResult;
     default:
         break;
     }
 
     PlatformGestureEventBuilder platformEvent(mainFrameImpl()->frameView(), event);
 
     // Special handling for double tap and scroll events as we don't want to
     // hit test for them.
     switch (event.type) {
     case WebInputEvent::GestureDoubleTap:
         if (m_webSettings->doubleTapToZoomEnabled() && minimumPageScaleFactor() != maximumPageScaleFactor()) {
             m_client->cancelScheduledContentIntents();
             animateDoubleTapZoom(platformEvent.position());
         }
         // GestureDoubleTap is currently only used by Android for zooming. For WebCore,
         // GestureTap with tap count = 2 is used instead. So we drop GestureDoubleTap here.
-        eventSwallowed = true;
+        eventResult = WebInputEventResult::HandledSystem;
         m_client->didHandleGestureEvent(event, eventCancelled);
-        return eventSwallowed;
+        return eventResult;
     case WebInputEvent::GestureScrollBegin:
         m_client->cancelScheduledContentIntents();
     case WebInputEvent::GestureScrollEnd:
     case WebInputEvent::GestureScrollUpdate:
     case WebInputEvent::GestureFlingStart:
         // Scrolling-related gesture events invoke EventHandler recursively for each frame down
         // the chain, doing a single-frame hit-test per frame. This matches handleWheelEvent.
         // Perhaps we could simplify things by rewriting scroll handling to work inner frame
         // out, and then unify with other gesture events.
-        eventSwallowed = mainFrameImpl()->frame()->eventHandler().handleGestureScrollEvent(platformEvent);
+        eventResult = mainFrameImpl()->frame()->eventHandler().handleGestureScrollEvent(platformEvent);
         m_client->didHandleGestureEvent(event, eventCancelled);
-        return eventSwallowed;
+        return eventResult;
     case WebInputEvent::GesturePinchBegin:
     case WebInputEvent::GesturePinchEnd:
     case WebInputEvent::GesturePinchUpdate:
-        return false;
+        return WebInputEventResult::NotHandled;
     default:
         break;
     }
 
     // Hit test across all frames and do touch adjustment as necessary for the event type.
     GestureEventWithHitTestResults targetedEvent =
         m_page->deprecatedLocalMainFrame()->eventHandler().targetGestureEvent(platformEvent);
 
     // Handle link highlighting outside the main switch to avoid getting lost in the
     // complicated set of cases handled below.
@@ skipping 16 matching lines @@
     case WebInputEvent::GestureTap: {
         // If there is a popup open, close it as the user is clicking on the page
         // (outside of the popup). We also save it so we can prevent a tap on an
         // element from immediately reopening the same popup.
         RefPtr<WebPagePopupImpl> pagePopup = m_pagePopup;
         hidePopups();
         ASSERT(!m_pagePopup);
 
         m_client->cancelScheduledContentIntents();
         if (detectContentOnTouch(targetedEvent)) {
-            eventSwallowed = true;
+            eventResult = WebInputEventResult::HandledSystem;
             break;
         }
 
         // Don't trigger a disambiguation popup on sites designed for mobile devices.
         // Instead, assume that the page has been designed with big enough buttons and links.
         // Don't trigger a disambiguation popup when screencasting, since it's implemented outside of
         // compositor pipeline and is not being screencasted itself. This leads to bad user experience.
         WebDevToolsAgentImpl* devTools = mainFrameDevToolsAgentImpl();
         VisualViewport& visualViewport = page()->frameHost().visualViewport();
         bool screencastEnabled = devTools && devTools->screencastEnabled();
@@ skipping 13 matching lines @@
                 WillBeHeapVector<RawPtrWillBeMember<Node>> highlightNodes;
                 findGoodTouchTargets(boundingBox, mainFrameImpl()->frame(), goodTargets, highlightNodes);
                 // FIXME: replace touch adjustment code when numberOfGoodTargets == 1?
                 // Single candidate case is currently handled by: https://bugs.webkit.org/show_bug.cgi?id=85101
                 if (goodTargets.size() >= 2 && m_client
                     && m_client->didTapMultipleTargets(visualViewportOffset, boundingBox, goodTargets)) {
 
                     enableTapHighlights(highlightNodes);
                     for (size_t i = 0; i < m_linkHighlights.size(); ++i)
                         m_linkHighlights[i]->startHighlightAnimationIfNeeded();
-                    eventSwallowed = true;
+                    eventResult = WebInputEventResult::HandledSystem;
                     eventCancelled = true;
                     break;
                 }
             }
         }
 
-        eventSwallowed = mainFrameImpl()->frame()->eventHandler().handleGestureEvent(targetedEvent);
+        eventResult = mainFrameImpl()->frame()->eventHandler().handleGestureEvent(targetedEvent);
 
         if (m_pagePopup && pagePopup && m_pagePopup->hasSamePopupClient(pagePopup.get())) {
             // The tap triggered a page popup that is the same as the one we just closed.
             // It needs to be closed.
             cancelPagePopup();
         }
         break;
     }
     case WebInputEvent::GestureTwoFingerTap:
     case WebInputEvent::GestureLongPress:
     case WebInputEvent::GestureLongTap: {
         if (!mainFrameImpl() || !mainFrameImpl()->frameView())
             break;
 
         m_client->cancelScheduledContentIntents();
         m_page->contextMenuController().clearContextMenu();
         {
             ContextMenuAllowedScope scope;
-            eventSwallowed = mainFrameImpl()->frame()->eventHandler().handleGestureEvent(targetedEvent);
+            eventResult = mainFrameImpl()->frame()->eventHandler().handleGestureEvent(targetedEvent);
         }
 
         break;
     }
     case WebInputEvent::GestureShowPress:
         m_client->cancelScheduledContentIntents();
     case WebInputEvent::GestureTapDown:
     case WebInputEvent::GestureTapCancel:
     case WebInputEvent::GestureTapUnconfirmed: {
-        eventSwallowed = mainFrameImpl()->frame()->eventHandler().handleGestureEvent(targetedEvent);
+        eventResult = mainFrameImpl()->frame()->eventHandler().handleGestureEvent(targetedEvent);
         break;
     }
     default:
         ASSERT_NOT_REACHED();
     }
     m_client->didHandleGestureEvent(event, eventCancelled);
-    return eventSwallowed;
+    return eventResult;
 }
 
-bool WebViewImpl::handleSyntheticWheelFromTouchpadPinchEvent(const WebGestureEvent& pinchEvent)
+WebInputEventResult WebViewImpl::handleSyntheticWheelFromTouchpadPinchEvent(const WebGestureEvent& pinchEvent)
 {
     ASSERT(pinchEvent.type == WebInputEvent::GesturePinchUpdate);
 
     // Touchscreen pinch events should not reach Blink.
     ASSERT(pinchEvent.sourceDevice == WebGestureDeviceTouchpad);
 
     // For pinch gesture events, match typical trackpad behavior on Windows by sending fake
     // wheel events with the ctrl modifier set when we see trackpad pinch gestures.  Ideally
     // we'd someday get a platform 'pinch' event and send that instead.
     WebMouseWheelEvent wheelEvent;
@@ skipping 128 matching lines @@
 }
 
 void WebViewImpl::acceptLanguagesChanged()
 {
     if (!page())
         return;
 
     page()->acceptLanguagesChanged();
 }
 
-bool WebViewImpl::handleKeyEvent(const WebKeyboardEvent& event)
+WebInputEventResult WebViewImpl::handleKeyEvent(const WebKeyboardEvent& event)
 {
     ASSERT((event.type == WebInputEvent::RawKeyDown)
         || (event.type == WebInputEvent::KeyDown)
         || (event.type == WebInputEvent::KeyUp));
     TRACE_EVENT2("input", "WebViewImpl::handleKeyEvent",
         "type", inputTypeToName(event.type),
         "text", String(event.text).utf8());
 
     // Halt an in-progress fling on a key event.
     endActiveFlingAnimation();
 
     // Please refer to the comments explaining the m_suppressNextKeypressEvent
     // member.
     // The m_suppressNextKeypressEvent is set if the KeyDown is handled by
     // Webkit. A keyDown event is typically associated with a keyPress(char)
     // event and a keyUp event. We reset this flag here as this is a new keyDown
     // event.
     m_suppressNextKeypressEvent = false;
 
     // If there is a popup, it should be the one processing the event, not the
     // page.
     if (m_pagePopup) {
         m_pagePopup->handleKeyEvent(PlatformKeyboardEventBuilder(event));
         // We need to ignore the next Char event after this otherwise pressing
         // enter when selecting an item in the popup will go to the page.
         if (WebInputEvent::RawKeyDown == event.type)
             m_suppressNextKeypressEvent = true;
-        return true;
+        return WebInputEventResult::HandledSystem;
     }
 
     RefPtrWillBeRawPtr<Frame> focusedFrame = focusedCoreFrame();
     if (focusedFrame && focusedFrame->isRemoteFrame()) {
         WebRemoteFrameImpl* webFrame = WebRemoteFrameImpl::fromFrame(*toRemoteFrame(focusedFrame.get()));
         webFrame->client()->forwardInputEvent(&event);
-        return true;
+        return WebInputEventResult::HandledSystem;
     }
 
     if (!focusedFrame || !focusedFrame->isLocalFrame())
-        return false;
+        return WebInputEventResult::NotHandled;
 
     LocalFrame* frame = toLocalFrame(focusedFrame.get());
 
     PlatformKeyboardEventBuilder evt(event);
 
-    if (frame->eventHandler().keyEvent(evt)) {
+    WebInputEventResult result = frame->eventHandler().keyEvent(evt);
+    if (result != WebInputEventResult::NotHandled) {
         if (WebInputEvent::RawKeyDown == event.type) {
             // Suppress the next keypress event unless the focused node is a plugin node.
             // (Flash needs these keypress events to handle non-US keyboards.)
             Element* element = focusedElement();
             if (element && element->layoutObject() && element->layoutObject()->isEmbeddedObject()) {
                 if (event.windowsKeyCode == VKEY_TAB) {
                     // If the plugin supports keyboard focus then we should not send a tab keypress event.
                     Widget* widget = toLayoutPart(element->layoutObject())->widget();
                     if (widget && widget->isPluginContainer()) {
                         WebPluginContainerImpl* plugin = toWebPluginContainerImpl(widget);
                         if (plugin && plugin->supportsKeyboardFocus())
                             m_suppressNextKeypressEvent = true;
                     }
                 }
             } else {
                 m_suppressNextKeypressEvent = true;
             }
         }
-        return true;
+        return result;
     }
 
 #if !OS(MACOSX)
     const WebInputEvent::Type contextMenuTriggeringEventType =
 #if OS(WIN)
         WebInputEvent::KeyUp;
 #else
         WebInputEvent::RawKeyDown;
 #endif
 
     bool isUnmodifiedMenuKey = !(event.modifiers & WebInputEvent::InputModifiers) && event.windowsKeyCode == VKEY_APPS;
     bool isShiftF10 = event.modifiers == WebInputEvent::ShiftKey && event.windowsKeyCode == VKEY_F10;
     if ((isUnmodifiedMenuKey || isShiftF10) && event.type == contextMenuTriggeringEventType) {
         sendContextMenuEvent(event);
-        return true;
+        return WebInputEventResult::HandledSystem;
     }
 #endif // !OS(MACOSX)
 
-    return keyEventDefault(event);
+    if (keyEventDefault(event))
+        return WebInputEventResult::HandledSystem;
+    return WebInputEventResult::NotHandled;
 }
 
-bool WebViewImpl::handleCharEvent(const WebKeyboardEvent& event)
+WebInputEventResult WebViewImpl::handleCharEvent(const WebKeyboardEvent& event)
 {
     ASSERT(event.type == WebInputEvent::Char);
     TRACE_EVENT1("input", "WebViewImpl::handleCharEvent",
         "text", String(event.text).utf8());
 
     // Please refer to the comments explaining the m_suppressNextKeypressEvent
     // member.  The m_suppressNextKeypressEvent is set if the KeyDown is
     // handled by Webkit. A keyDown event is typically associated with a
     // keyPress(char) event and a keyUp event. We reset this flag here as it
     // only applies to the current keyPress event.
     bool suppress = m_suppressNextKeypressEvent;
     m_suppressNextKeypressEvent = false;
 
     // If there is a popup, it should be the one processing the event, not the
     // page.
     if (m_pagePopup)
         return m_pagePopup->handleKeyEvent(PlatformKeyboardEventBuilder(event));
 
     LocalFrame* frame = toLocalFrame(focusedCoreFrame());
     if (!frame)
-        return suppress;
+        return suppress ? WebInputEventResult::HandledSuppressed : WebInputEventResult::NotHandled;
 
     EventHandler& handler = frame->eventHandler();
 
     PlatformKeyboardEventBuilder evt(event);
     if (!evt.isCharacterKey())
-        return true;
+        return WebInputEventResult::HandledSuppressed;
 
     // Accesskeys are triggered by char events and can't be suppressed.
     if (handler.handleAccessKey(evt))
-        return true;
+        return WebInputEventResult::HandledSystem;
 
     // Safari 3.1 does not pass off windows system key messages (WM_SYSCHAR) to
     // the eventHandler::keyEvent. We mimic this behavior on all platforms since
     // for now we are converting other platform's key events to windows key
     // events.
     if (evt.isSystemKey())
-        return false;
+        return WebInputEventResult::NotHandled;
 
-    if (!suppress && !handler.keyEvent(evt))
-        return keyEventDefault(event);
+    if (suppress)
+        return WebInputEventResult::HandledSuppressed;
 
-    return true;
+    WebInputEventResult result = handler.keyEvent(evt);
+    if (result != WebInputEventResult::NotHandled)
+        return result;
+    if (keyEventDefault(event))
+        return WebInputEventResult::HandledSystem;
+
+    return WebInputEventResult::NotHandled;
 }
 
 WebRect WebViewImpl::computeBlockBound(const WebPoint& pointInRootFrame, bool ignoreClipping)
 {
     if (!mainFrameImpl())
         return WebRect();
 
     // Use the point-based hit test to find the node.
     IntPoint point = mainFrameImpl()->frameView()->rootFrameToContents(IntPoint(pointInRootFrame.x, pointInRootFrame.y));
     HitTestRequest::HitTestRequestType hitType = HitTestRequest::ReadOnly | HitTestRequest::Active | (ignoreClipping ? HitTestRequest::IgnoreClipping : 0);
@@ skipping 307 matching lines @@
 }
 
 bool WebViewImpl::hasTouchEventHandlersAt(const WebPoint& point)
 {
     // FIXME: Implement this. Note that the point must be divided by pageScaleFactor.
     return true;
 }
 
 #if !OS(MACOSX)
 // Mac has no way to open a context menu based on a keyboard event.
-bool WebViewImpl::sendContextMenuEvent(const WebKeyboardEvent& event)
+WebInputEventResult WebViewImpl::sendContextMenuEvent(const WebKeyboardEvent& event)
 {
     // The contextMenuController() holds onto the last context menu that was
     // popped up on the page until a new one is created. We need to clear
     // this menu before propagating the event through the DOM so that we can
     // detect if we create a new menu for this event, since we won't create
     // a new menu if the DOM swallows the event and the defaultEventHandler does
     // not run.
     page()->contextMenuController().clearContextMenu();
 
-    bool handled;
     {
         ContextMenuAllowedScope scope;
         Frame* focusedFrame = page()->focusController().focusedOrMainFrame();
         if (!focusedFrame->isLocalFrame())
-            return false;
-        handled = toLocalFrame(focusedFrame)->eventHandler().sendContextMenuEventForKey(nullptr);
+            return WebInputEventResult::NotHandled;
+        return toLocalFrame(focusedFrame)->eventHandler().sendContextMenuEventForKey(nullptr);
     }
-    return handled;
 }
 #endif
 
 void WebViewImpl::showContextMenuAtPoint(float x, float y, PassRefPtrWillBeRawPtr<ContextMenuProvider> menuProvider)
 {
     if (!page()->mainFrame()->isLocalFrame())
         return;
     {
         ContextMenuAllowedScope scope;
         page()->contextMenuController().clearContextMenu();
@@ skipping 515 matching lines @@
     return mainFrameImpl()->frameView()->horizontalScrollbar();
 }
 
 bool WebViewImpl::hasVerticalScrollbar()
 {
     return mainFrameImpl()->frameView()->verticalScrollbar();
 }
 
 const WebInputEvent* WebViewImpl::m_currentInputEvent = nullptr;
 
-bool WebViewImpl::handleInputEvent(const WebInputEvent& inputEvent)
+WebInputEventResult WebViewImpl::handleInputEvent(const WebInputEvent& inputEvent)
 {
     // TODO(dcheng): The fact that this is getting called when there is no local
     // main frame is problematic and probably indicates a bug in the input event
     // routing code.
     if (!mainFrameImpl())
-        return false;
+        return WebInputEventResult::NotHandled;
 
     WebAutofillClient* autofillClient = mainFrameImpl()->autofillClient();
     UserGestureNotifier notifier(autofillClient, &m_userGestureObserved);
     // On the first input event since page load, |notifier| instructs the
     // autofill client to unblock values of password input fields of any forms
     // on the page. There is a single input event, GestureTap, which can both
     // be the first event after page load, and cause a form submission. In that
     // case, the form submission happens before the autofill client is told
     // to unblock the password values, and so the password values are not
     // submitted. To avoid that, GestureTap is handled explicitly:
     if (inputEvent.type == WebInputEvent::GestureTap && autofillClient) {
         m_userGestureObserved = true;
         autofillClient->firstUserGestureObserved();
     }
 
     page()->frameHost().visualViewport().startTrackingPinchStats();
 
     TRACE_EVENT1("input", "WebViewImpl::handleInputEvent", "type", inputTypeToName(inputEvent.type));
     // If we've started a drag and drop operation, ignore input events until
     // we're done.
     if (m_doingDragAndDrop)
-        return true;
+        return WebInputEventResult::HandledSuppressed;
 
     if (m_devToolsEmulator->handleInputEvent(inputEvent))
-        return true;
+        return WebInputEventResult::HandledSuppressed;
 
     if (InspectorOverlay* overlay = inspectorOverlay()) {
         if (overlay->handleInputEvent(inputEvent))
-            return true;
+            return WebInputEventResult::HandledSuppressed;
     }
 
     if (inputEvent.modifiers & WebInputEvent::IsTouchAccessibility
         && WebInputEvent::isMouseEventType(inputEvent.type)) {
         PlatformMouseEventBuilder pme(mainFrameImpl()->frameView(), static_cast<const WebMouseEvent&>(inputEvent));
 
         // Find the right target frame. See issue 1186900.
         HitTestResult result = hitTestResultForRootFramePos(pme.position());
         Frame* targetFrame;
         if (result.innerNodeOrImageMapImage())
             targetFrame = result.innerNodeOrImageMapImage()->document().frame();
         else
             targetFrame = m_page->focusController().focusedOrMainFrame();
 
         if (targetFrame->isLocalFrame()) {
             LocalFrame* targetLocalFrame = toLocalFrame(targetFrame);
             Document* document = targetLocalFrame->document();
             if (document) {
                 AXObjectCache* cache = document->existingAXObjectCache();
                 if (cache)
                     cache->onTouchAccessibilityHover(pme.position());
             }
         }
     }
 
     // Report the event to be NOT processed by WebKit, so that the browser can handle it appropriately.
     if (m_ignoreInputEvents)
-        return false;
+        return WebInputEventResult::NotHandled;
 
     TemporaryChange<const WebInputEvent*> currentEventChange(m_currentInputEvent, &inputEvent);
     UIEventWithKeyState::clearNewTabModifierSetFromIsolatedWorld();
 
     if (isPointerLocked() && WebInputEvent::isMouseEventType(inputEvent.type)) {
         pointerLockMouseEvent(inputEvent);
-        return true;
+        return WebInputEventResult::HandledSystem;
     }
 
     if (m_mouseCaptureNode && WebInputEvent::isMouseEventType(inputEvent.type)) {
         TRACE_EVENT1("input", "captured mouse event", "type", inputEvent.type);
         // Save m_mouseCaptureNode since mouseCaptureLost() will clear it.
         RefPtrWillBeRawPtr<Node> node = m_mouseCaptureNode;
 
         // Not all platforms call mouseCaptureLost() directly.
         if (inputEvent.type == WebInputEvent::MouseUp)
             mouseCaptureLost();
@@ skipping 17 matching lines @@
             eventType = EventTypeNames::mouseup;
             gestureIndicator = adoptPtr(new UserGestureIndicator(m_mouseCaptureGestureToken.release()));
             break;
         default:
             ASSERT_NOT_REACHED();
         }
 
         node->dispatchMouseEvent(
             PlatformMouseEventBuilder(mainFrameImpl()->frameView(), static_cast<const WebMouseEvent&>(inputEvent)),
             eventType, static_cast<const WebMouseEvent&>(inputEvent).clickCount);
-        return true;
+        return WebInputEventResult::HandledSystem;
     }
 
     // FIXME: This should take in the intended frame, not the local frame root.
-    if (PageWidgetDelegate::handleInputEvent(*this, inputEvent, mainFrameImpl()->frame()))
-        return true;
+    WebInputEventResult result = PageWidgetDelegate::handleInputEvent(*this, inputEvent, mainFrameImpl()->frame());
+    if (result != WebInputEventResult::NotHandled)
+        return result;
 
     // Unhandled touchpad gesture pinch events synthesize mouse wheel events.
     if (inputEvent.type == WebInputEvent::GesturePinchUpdate) {
         const WebGestureEvent& pinchEvent = static_cast<const WebGestureEvent&>(inputEvent);
 
         // First, synthesize a Windows-like wheel event to send to any handlers that may exist.
-        if (handleSyntheticWheelFromTouchpadPinchEvent(pinchEvent))
-            return true;
+        result = handleSyntheticWheelFromTouchpadPinchEvent(pinchEvent);
+        if (result != WebInputEventResult::NotHandled)
+            return result;
 
         if (pinchEvent.data.pinchUpdate.zoomDisabled)
-            return false;
+            return WebInputEventResult::NotHandled;
 
         if (page()->frameHost().visualViewport().magnifyScaleAroundAnchor(pinchEvent.data.pinchUpdate.scale, FloatPoint(pinchEvent.x, pinchEvent.y)))
-            return true;
+            return WebInputEventResult::HandledSystem;
     }
 
-    return false;
+    return WebInputEventResult::NotHandled;
 }
 
 void WebViewImpl::setCursorVisibilityState(bool isVisible)
 {
     if (m_page)
         m_page->setIsCursorVisible(isVisible);
 }
 
 void WebViewImpl::mouseCaptureLost()
 {
@@ skipping 2276 matching lines @@
     if (m_pageColorOverlay)
         m_pageColorOverlay->update();
     if (InspectorOverlay* overlay = inspectorOverlay()) {
         PageOverlay* inspectorPageOverlay = overlay->pageOverlay();
         if (inspectorPageOverlay)
             inspectorPageOverlay->update();
     }
 }
 
 } // namespace blink