Revert 276728 "Fix slop region boundary handling."

trunk/src/ui/events/gestures/unified_gesture_detector_enabled.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 "base/command_line.h"
-#include "base/logging.h"
-#include "ui/events/event_switches.h"
-#include "ui/events/gestures/unified_gesture_detector_enabled.h"
-
-namespace ui {
-
-bool IsUnifiedGestureDetectorEnabled() {
-  const bool kUseUnifiedGestureDetectorByDefault = false;
-
-  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
-  const std::string unified_gd_enabled_switch =
-      command_line.HasSwitch(switches::kUnifiedGestureDetector) ?
-      command_line.GetSwitchValueASCII(switches::kUnifiedGestureDetector) :
-      switches::kUnifiedGestureDetectorAuto;
-
-  if (unified_gd_enabled_switch.empty() ||
-      unified_gd_enabled_switch == switches::kUnifiedGestureDetectorEnabled) {
-    return true;
-  }
-
-  if (unified_gd_enabled_switch == switches::kUnifiedGestureDetectorDisabled)
-    return false;
-
-  if (unified_gd_enabled_switch == switches::kUnifiedGestureDetectorAuto)
-    return kUseUnifiedGestureDetectorByDefault;
-
-  LOG(ERROR) << "Invalid --unified-gesture-detector option: "
-             << unified_gd_enabled_switch;
-  return false;
-}
-
-}  // namespace ui