Prepare SyntheticPointerAction to handle touch actions for multiple fingers

content/browser/renderer_host/input/synthetic_gesture_controller.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_controller.h"
 
 #include <utility>
 
 #include "base/trace_event/trace_event.h"
 #include "content/browser/renderer_host/input/synthetic_gesture_target.h"
 #include "content/common/input/synthetic_smooth_scroll_gesture_params.h"
 #include "content/common/input_messages.h"
 #include "content/public/browser/render_widget_host.h"
 
 namespace content {
 
 SyntheticGestureController::SyntheticGestureController(
     std::unique_ptr<SyntheticGestureTarget> gesture_target)
-    : gesture_target_(std::move(gesture_target)) {}
+    : gesture_target_(std::move(gesture_target)) {
+  pointer_action_controller_.SetDefaultGestureSourceType(
+      gesture_target_->GetDefaultSyntheticGestureSourceType());
+}
 
 SyntheticGestureController::~SyntheticGestureController() {}
 
 void SyntheticGestureController::QueueSyntheticGesture(
     std::unique_ptr<SyntheticGesture> synthetic_gesture,
     const OnGestureCompleteCallback& completion_callback) {
   DCHECK(synthetic_gesture);
 
   bool was_empty = pending_gesture_queue_.IsEmpty();
 
   pending_gesture_queue_.Push(std::move(synthetic_gesture),
                               completion_callback);
 
   if (was_empty)
     StartGesture(*pending_gesture_queue_.FrontGesture());
 }
 
+void SyntheticGestureController::QueueSyntheticPointerAction(
+    const SyntheticPointerActionParams& gesture_params,
+    const OnGestureCompleteCallback& completion_callback) {
+  std::unique_ptr<SyntheticGesture> synthetic_gesture =
+      pointer_action_controller_.CreateSyntheticPointerAction(gesture_params);
+  if (synthetic_gesture)
+    QueueSyntheticGesture(std::move(synthetic_gesture), completion_callback);
+}
+
+void SyntheticGestureController::ResetSyntheticPointer() {
+  pointer_action_controller_.ResetSyntheticPointer();
+}
+
 void SyntheticGestureController::Flush(base::TimeTicks timestamp) {
   TRACE_EVENT0("input", "SyntheticGestureController::Flush");
   if (pending_gesture_queue_.IsEmpty())
     return;
 
   if (pending_gesture_result_)
     return;
 
   SyntheticGesture* gesture = pending_gesture_queue_.FrontGesture();
   SyntheticGesture::Result result =
@@ skipping 47 matching lines @@
 }
 
 SyntheticGestureController::GestureAndCallbackQueue::GestureAndCallbackQueue() {
 }
 
 SyntheticGestureController::GestureAndCallbackQueue::
     ~GestureAndCallbackQueue() {
 }
 
 }  // namespace content