Revert of [blink] Unique pointers in Platform.h

ui/events/blink/input_handler_proxy.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 "ui/events/blink/input_handler_proxy.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 
@@ skipping 975 matching lines @@
       if (!touchpad_and_wheel_scroll_latching_enabled_ &&
           gesture_event.source_device == blink::kWebGestureDeviceTouchpad) {
         scroll_state.set_is_ending(true);
         input_handler_->ScrollEnd(&scroll_state);
       }
 
       const float vx = gesture_event.data.fling_start.velocity_x;
       const float vy = gesture_event.data.fling_start.velocity_y;
       current_fling_velocity_ = gfx::Vector2dF(vx, vy);
       DCHECK(!current_fling_velocity_.IsZero());
-      fling_curve_ = client_->CreateFlingAnimationCurve(
-          gesture_event.source_device, WebFloatPoint(vx, vy), blink::WebSize());
+      fling_curve_.reset(client_->CreateFlingAnimationCurve(
+          gesture_event.source_device, WebFloatPoint(vx, vy),
+          blink::WebSize()));
       disallow_horizontal_fling_scroll_ = !vx;
       disallow_vertical_fling_scroll_ = !vy;
       TRACE_EVENT_ASYNC_BEGIN2("input,benchmark,rail",
                                "InputHandlerProxy::HandleGestureFling::started",
                                this, "vx", vx, "vy", vy);
       // Note that the timestamp will only be used to kickstart the animation if
       // its sufficiently close to the timestamp of the first call |Animate()|.
       has_fling_animation_started_ = false;
       fling_parameters_.start_time = gesture_event.TimeStampSeconds();
       fling_parameters_.delta = WebFloatPoint(vx, vy);
@@ skipping 220 matching lines @@
         current_fling_velocity_ += new_fling_velocity;
       else
         current_fling_velocity_ = new_fling_velocity;
 
       WebFloatPoint velocity(current_fling_velocity_.x(),
                              current_fling_velocity_.y());
       deferred_fling_cancel_time_seconds_ = 0;
       disallow_horizontal_fling_scroll_ = !velocity.x;
       disallow_vertical_fling_scroll_ = !velocity.y;
       last_fling_boost_event_ = WebGestureEvent();
-      fling_curve_ = client_->CreateFlingAnimationCurve(
-          gesture_event.source_device, velocity, blink::WebSize());
+      fling_curve_.reset(client_->CreateFlingAnimationCurve(
+          gesture_event.source_device, velocity, blink::WebSize()));
       fling_parameters_.start_time = gesture_event.TimeStampSeconds();
       fling_parameters_.delta = velocity;
       fling_parameters_.point = WebPoint(gesture_event.x, gesture_event.y);
       fling_parameters_.global_point =
           WebPoint(gesture_event.global_x, gesture_event.global_y);
 
       TRACE_EVENT_INSTANT2("input",
                            fling_boosted ? "InputHandlerProxy::FlingBoosted"
                                          : "InputHandlerProxy::FlingReplaced",
                            TRACE_EVENT_SCOPE_THREAD,
@@ skipping 394 matching lines @@
                  scroll_elasticity_controller_->GetWeakPtr(), gesture_event,
                  scroll_result));
 }
 
 void InputHandlerProxy::SetTickClockForTesting(
     std::unique_ptr<base::TickClock> tick_clock) {
   tick_clock_ = std::move(tick_clock);
 }
 
 }  // namespace ui