aura: Introduce EventInjector.

content/browser/renderer_host/input/synthetic_gesture_target_aura.cc

 // Copyright 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/browser/renderer_host/input/synthetic_gesture_target_aura.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <vector>
 
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_aura.h"
 #include "content/browser/renderer_host/ui_events_helper.h"
+#include "ui/aura/event_injector.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/events/event_sink.h"
 #include "ui/events/event_utils.h"
 #include "ui/events/gesture_detection/gesture_configuration.h"
 
 using blink::WebTouchEvent;
 using blink::WebMouseWheelEvent;
 
 namespace content {
@@ skipping 14 matching lines @@
     touch_with_latency.event.touches[i].radius_x *= device_scale_factor_;
     touch_with_latency.event.touches[i].radius_y *= device_scale_factor_;
   }
   std::vector<std::unique_ptr<ui::TouchEvent>> events;
   bool conversion_success = MakeUITouchEventsFromWebTouchEvents(
       touch_with_latency, &events, LOCAL_COORDINATES);
   DCHECK(conversion_success);
 
   aura::Window* window = GetWindow();
   aura::WindowTreeHost* host = window->GetHost();
+  aura::EventInjector injector;
+
   for (const auto& event : events) {
     event->ConvertLocationToTarget(window, host->window());
-
     // Apply the screen scale factor to the event location after it has been
     // transformed to the target.
     gfx::PointF device_location =
         gfx::ScalePoint(event->location_f(), device_scale_factor_);
     gfx::PointF device_root_location =
         gfx::ScalePoint(event->root_location_f(), device_scale_factor_);
     event->set_location_f(device_location);
     event->set_root_location_f(device_root_location);
-    ui::EventDispatchDetails details =
-        host->event_sink()->OnEventFromSource(event.get());
+    ui::EventDispatchDetails details = injector.Inject(host, event.get());
     if (details.dispatcher_destroyed)
       break;
   }
 }
 
 void SyntheticGestureTargetAura::DispatchWebMouseWheelEventToPlatform(
       const blink::WebMouseWheelEvent& web_wheel,
       const ui::LatencyInfo&) {
   ui::MouseWheelEvent wheel_event(
       gfx::Vector2d(web_wheel.delta_x, web_wheel.delta_y), gfx::Point(),
       gfx::Point(), ui::EventTimeForNow(), ui::EF_NONE, ui::EF_NONE);
   gfx::PointF location(web_wheel.PositionInWidget().x * device_scale_factor_,
                        web_wheel.PositionInWidget().y * device_scale_factor_);
   wheel_event.set_location_f(location);
   wheel_event.set_root_location_f(location);
 
   aura::Window* window = GetWindow();
   wheel_event.ConvertLocationToTarget(window, window->GetRootWindow());
+  aura::EventInjector injector;
   ui::EventDispatchDetails details =
-      window->GetHost()->event_sink()->OnEventFromSource(&wheel_event);
+      injector.Inject(window->GetHost(), &wheel_event);
   if (details.dispatcher_destroyed)
     return;
 }
 
 namespace {
 
 ui::EventType
 WebMouseEventTypeToEventType(blink::WebInputEvent::Type web_type) {
   switch (web_type) {
     case blink::WebInputEvent::kMouseDown:
@@ skipping 63 matching lines @@
                              ui::EventTimeForNow(), flags, flags,
                              pointer_details);
   gfx::PointF location(
       web_mouse_event.PositionInWidget().x * device_scale_factor_,
       web_mouse_event.PositionInWidget().y * device_scale_factor_);
   mouse_event.set_location_f(location);
   mouse_event.set_root_location_f(location);
 
   aura::Window* window = GetWindow();
   mouse_event.ConvertLocationToTarget(window, window->GetRootWindow());
+  aura::EventInjector injector;
   ui::EventDispatchDetails details =
-      window->GetHost()->event_sink()->OnEventFromSource(&mouse_event);
+      injector.Inject(window->GetHost(), &mouse_event);
   if (details.dispatcher_destroyed)
     return;
 }
 
 SyntheticGestureParams::GestureSourceType
 SyntheticGestureTargetAura::GetDefaultSyntheticGestureSourceType() const {
   return SyntheticGestureParams::TOUCH_INPUT;
 }
 
 float SyntheticGestureTargetAura::GetTouchSlopInDips() const {
   // - 1 because Aura considers a pointer to be moving if it has moved at least
   // 'max_touch_move_in_pixels_for_click' pixels.
   return ui::GestureConfiguration::GetInstance()
              ->max_touch_move_in_pixels_for_click() -
          1;
 }
 
 float SyntheticGestureTargetAura::GetMinScalingSpanInDips() const {
   return ui::GestureConfiguration::GetInstance()
       ->min_distance_for_pinch_scroll_in_pixels();
 }
 
 aura::Window* SyntheticGestureTargetAura::GetWindow() const {
   aura::Window* window = render_widget_host()->GetView()->GetNativeView();
   DCHECK(window);
   return window;
 }
 
 }  // namespace content