Indicate whether a touch event will cause scrolling

content/browser/renderer_host/input/input_router_config_helper.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 "content/browser/renderer_host/input/input_router_config_helper.h"
 
 #include "base/command_line.h"
 #include "content/public/common/content_switches.h"
 #include "ui/events/gesture_detection/gesture_detector.h"
 
@@ skipping 32 matching lines @@
           gesture_config->fling_max_cancel_to_down_time_in_ms());
 
   config.touchpad_tap_suppression_config.max_tap_gap_time =
       base::TimeDelta::FromMilliseconds(
           gesture_config->fling_max_tap_gap_time_in_ms());
 
   return config;
 }
 
 TouchEventQueue::Config GetTouchEventQueueConfig() {
-  TouchEventQueue::Config config;
-
-  config.touchmove_slop_suppression_length_dips =
-      ui::GestureConfiguration::GetInstance()
-          ->max_touch_move_in_pixels_for_click();
-
-  return config;
+  return TouchEventQueue::Config();
 }
 
 #elif defined(OS_ANDROID)
 
 // Default time allowance for the touch ack delay before the touch sequence is
 // cancelled.
 const int kTouchAckTimeoutDelayMs = 200;
 
 GestureEventQueue::Config GetGestureEventQueueConfig() {
   GestureEventQueue::Config config;
 
   config.touchscreen_tap_suppression_config.enabled = true;
   config.touchscreen_tap_suppression_config.max_cancel_to_down_time =
       base::TimeDelta::FromMilliseconds(
           gfx::ViewConfiguration::GetTapTimeoutInMs());
   config.touchscreen_tap_suppression_config.max_tap_gap_time =
       base::TimeDelta::FromMilliseconds(
           gfx::ViewConfiguration::GetLongPressTimeoutInMs());
 
   return config;
 }
 
 TouchEventQueue::Config GetTouchEventQueueConfig() {
   TouchEventQueue::Config config;
 
   config.touch_ack_timeout_delay =
       base::TimeDelta::FromMilliseconds(kTouchAckTimeoutDelayMs);
   config.touch_ack_timeout_supported = true;
 
-  const double touch_slop_length_pixels =
-      static_cast<double>(gfx::ViewConfiguration::GetTouchSlopInPixels());
-  const double device_scale_factor =
-      gfx::Screen::GetNativeScreen()->GetPrimaryDisplay().device_scale_factor();
-  config.touchmove_slop_suppression_length_dips =
-      touch_slop_length_pixels / device_scale_factor;
-
   return config;
 }
 
 #else
 
 GestureEventQueue::Config GetGestureEventQueueConfig() {
   return GestureEventQueue::Config();
 }
 
 TouchEventQueue::Config GetTouchEventQueueConfig() {
-  TouchEventQueue::Config config;
-  config.touchmove_slop_suppression_length_dips =
-      ui::GestureDetector::Config().touch_slop;
-  return config;
+  return TouchEventQueue::Config();
 }
 
 #endif
 
 TouchEventQueue::TouchScrollingMode GetTouchScrollingMode() {
   std::string modeString =
       base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
           switches::kTouchScrollingMode);
   if (modeString == switches::kTouchScrollingModeAsyncTouchmove)
     return TouchEventQueue::TOUCH_SCROLLING_MODE_ASYNC_TOUCHMOVE;
@@ skipping 10 matching lines @@
 
 InputRouterImpl::Config GetInputRouterConfigForPlatform() {
   InputRouterImpl::Config config;
   config.gesture_config = GetGestureEventQueueConfig();
   config.touch_config = GetTouchEventQueueConfig();
   config.touch_config.touch_scrolling_mode = GetTouchScrollingMode();
   return config;
 }
 
 }  // namespace content