Communicate whether passive event listeners exist to cc.

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 2013 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/renderer/gpu/render_widget_compositor.h"
 
 #include <stddef.h>
 #include <limits>
 #include <string>
 #include <utility>
@@ skipping 239 matching lines @@
       cmd->HasSwitch(cc::switches::kEnableMainFrameBeforeActivation) &&
       !cmd->HasSwitch(cc::switches::kDisableMainFrameBeforeActivation);
   settings.accelerated_animation_enabled =
       compositor_deps_->IsThreadedAnimationEnabled();
 
   settings.use_compositor_animation_timelines =
       !cmd->HasSwitch(switches::kDisableCompositorAnimationTimelines);
   blink::WebRuntimeFeatures::enableCompositorAnimationTimelines(
       settings.use_compositor_animation_timelines);
 
+  settings.use_mouse_wheel_gestures =
+      cmd->HasSwitch(switches::kEnableWheelGestures);
+
   settings.default_tile_size = CalculateDefaultTileSize(device_scale_factor);
   if (cmd->HasSwitch(switches::kDefaultTileWidth)) {
     int tile_width = 0;
     GetSwitchValueAsInt(*cmd,
                         switches::kDefaultTileWidth,
                         1,
                         std::numeric_limits<int>::max(),
                         &tile_width);
     settings.default_tile_size.set_width(tile_width);
   }
@@ skipping 468 matching lines @@
 void RenderWidgetCompositor::registerSelection(
     const blink::WebSelection& selection) {
   layer_tree_host_->RegisterSelection(ConvertWebSelection(selection));
 }
 
 void RenderWidgetCompositor::clearSelection() {
   cc::LayerSelection empty_selection;
   layer_tree_host_->RegisterSelection(empty_selection);
 }
 
-void RenderWidgetCompositor::setHaveWheelEventHandlers(bool value) {
-  layer_tree_host_->SetHaveWheelEventHandlers(value);
+static_assert(
+    static_cast<cc::EventListenerClass>(blink::WebEventListenerClass::Touch) ==
+        cc::EventListenerClass::kTouch,
+    "EventListenerClass and WebEventListenerClass enums must match");
+static_assert(static_cast<cc::EventListenerClass>(
+                  blink::WebEventListenerClass::MouseWheel) ==
+                  cc::EventListenerClass::kMouseWheel,
+              "EventListenerClass and WebEventListenerClass enums must match");
+
+static_assert(
+    static_cast<uint32_t>(blink::WebEventListenerProperties::Nothing) ==
+        cc::EventListenerProperties::kNone,
+    "EventListener and WebEventListener enums must match");
+static_assert(
+    static_cast<uint32_t>(blink::WebEventListenerProperties::Passive) ==
+        cc::EventListenerProperties::kPassive,
+    "EventListener and WebEventListener enums must match");
+static_assert(
+    static_cast<uint32_t>(blink::WebEventListenerProperties::Blocking) ==
+        cc::EventListenerProperties::kBlocking,
+    "EventListener and WebEventListener enums must match");
+
+void RenderWidgetCompositor::setEventListenerProperties(
+    blink::WebEventListenerClass eventClass,
+    blink::WebEventListenerProperties properties) {
+  layer_tree_host_->SetEventListenerProperties(
+      static_cast<cc::EventListenerClass>(eventClass),
+      static_cast<uint32_t>(properties));
 }
 
-bool RenderWidgetCompositor::haveWheelEventHandlers() const {
-  return layer_tree_host_->have_wheel_event_handlers();
+blink::WebEventListenerProperties
+RenderWidgetCompositor::eventListenerProperties(
+    blink::WebEventListenerClass event_class) const {
+  return static_cast<blink::WebEventListenerProperties>(
+      layer_tree_host_->event_listener_properties(
+          static_cast<cc::EventListenerClass>(event_class)));
 }
 
 void RenderWidgetCompositor::setHaveScrollEventHandlers(bool has_handlers) {
   layer_tree_host_->SetHaveScrollEventHandlers(has_handlers);
 }
 
 bool RenderWidgetCompositor::haveScrollEventHandlers() const {
   return layer_tree_host_->have_scroll_event_handlers();
 }
 
@@ skipping 352 matching lines @@
 #endif
   return actual;
 }
 
 void RenderWidgetCompositor::SetPaintedDeviceScaleFactor(
     float device_scale) {
   layer_tree_host_->SetPaintedDeviceScaleFactor(device_scale);
 }
 
 }  // namespace content