gfx: Make conversions from Size to SizeF be explicit.

ui/events/gesture_detection/gesture_provider.cc

 // Copyright 2014 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/gesture_detection/gesture_provider.h"
 
 #include <cmath>
 
 #include "base/auto_reset.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 70 matching lines @@
                                              public GestureListener,
                                              public DoubleTapListener {
  public:
   GestureListenerImpl(const GestureProvider::Config& config,
                       GestureProviderClient* client)
       : config_(config),
         client_(client),
         gesture_detector_(config.gesture_detector_config, this, this),
         scale_gesture_detector_(config.scale_gesture_detector_config, this),
         snap_scroll_controller_(config.gesture_detector_config.touch_slop,
-                                config.display.size()),
+                                gfx::SizeF(config.display.size())),
         ignore_multitouch_zoom_events_(false),
         ignore_single_tap_(false),
         pinch_event_sent_(false),
         scroll_event_sent_(false),
         max_diameter_before_show_press_(0),
         show_press_event_sent_(false) {}
 
   void OnTouchEvent(const MotionEvent& event) {
     const bool in_scale_gesture = IsScaleGestureDetectionInProgress();
     snap_scroll_controller_.SetSnapScrollMode(event, in_scale_gesture);
@@ skipping 719 matching lines @@
   // null'ing of the listener until the sequence has ended.
   if (current_down_event_)
     return;
 
   const bool double_tap_enabled =
       double_tap_support_for_page_ && double_tap_support_for_platform_;
   gesture_listener_->SetDoubleTapEnabled(double_tap_enabled);
 }
 
 }  //  namespace ui