Remove --ash-enable-tray-dragging flag

ash/wm/gestures/tray_gesture_handler.cc

Index: ash/wm/gestures/tray_gesture_handler.cc
diff --git a/ash/wm/gestures/tray_gesture_handler.cc b/ash/wm/gestures/tray_gesture_handler.cc
deleted file mode 100644
index ac7292906ffd30bf46a0e17e02f2637c37497d21..0000000000000000000000000000000000000000
--- a/ash/wm/gestures/tray_gesture_handler.cc
+++ /dev/null
@@ -1,107 +0,0 @@
-// Copyright (c) 2012 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 "ash/wm/gestures/tray_gesture_handler.h"
-
-#include "ash/shell.h"
-#include "ash/system/tray/system_tray.h"
-#include "ash/system/tray/system_tray_bubble.h"
-#include "ui/aura/window.h"
-#include "ui/compositor/layer.h"
-#include "ui/events/event.h"
-#include "ui/gfx/transform.h"
-#include "ui/views/widget/widget.h"
-
-const int kMinBubbleHeight = 13;
-
-namespace ash {
-
-TrayGestureHandler::TrayGestureHandler()
-    : widget_(NULL),
-      gesture_drag_amount_(0) {
-  // TODO(oshima): Support multiple display case.
-  SystemTray* tray = Shell::GetInstance()->GetPrimarySystemTray();
-  tray->ShowDefaultView(BUBBLE_CREATE_NEW);
-  SystemTrayBubble* bubble = tray->GetSystemBubble();
-  if (!bubble)
-    return;
-  bubble->bubble_view()->set_gesture_dragging(true);
-  widget_ = bubble->bubble_view()->GetWidget();
-  widget_->AddObserver(this);
-
-  gfx::Rect bounds = widget_->GetWindowBoundsInScreen();
-  int height_change = bounds.height() - kMinBubbleHeight;
-  bounds.set_height(kMinBubbleHeight);
-  bounds.set_y(bounds.y() + height_change);
-  widget_->SetBounds(bounds);
-}
-
-TrayGestureHandler::~TrayGestureHandler() {
-  if (widget_)
-    widget_->RemoveObserver(this);
-}
-
-bool TrayGestureHandler::UpdateGestureDrag(const ui::GestureEvent& event) {
-  CHECK_EQ(ui::ET_GESTURE_SCROLL_UPDATE, event.type());
-  if (!widget_)
-    return false;
-
-  gesture_drag_amount_ += event.details().scroll_y();
-  if (gesture_drag_amount_ > 0 && gesture_drag_amount_ < kMinBubbleHeight) {
-    widget_->Close();
-    return false;
-  }
-
-  gfx::Rect bounds = widget_->GetWindowBoundsInScreen();
-  int new_height = std::min(
-      kMinBubbleHeight + std::max(0, static_cast<int>(-gesture_drag_amount_)),
-      widget_->GetContentsView()->GetPreferredSize().height());
-  int height_change = bounds.height() - new_height;
-  bounds.set_height(new_height);
-  bounds.set_y(bounds.y() + height_change);
-  widget_->SetBounds(bounds);
-  return true;
-}
-
-void TrayGestureHandler::CompleteGestureDrag(const ui::GestureEvent& event) {
-  if (!widget_)
-    return;
-
-  widget_->RemoveObserver(this);
-
-  // Close the widget if it hasn't been dragged enough.
-  bool should_close = false;
-  int height = widget_->GetWindowBoundsInScreen().height();
-  int preferred_height =
-      widget_->GetContentsView()->GetPreferredSize().height();
-  if (event.type() == ui::ET_GESTURE_SCROLL_END) {
-    const float kMinThresholdGestureDrag = 0.4f;
-    if (height < preferred_height * kMinThresholdGestureDrag)
-      should_close = true;
-  } else if (event.type() == ui::ET_SCROLL_FLING_START) {
-    const float kMinThresholdGestureDragExposeFling = 0.25f;
-    const float kMinThresholdGestureFling = 1000.f;
-    if (height < preferred_height * kMinThresholdGestureDragExposeFling &&
-        event.details().velocity_y() > -kMinThresholdGestureFling)
-      should_close = true;
-  } else {
-    NOTREACHED();
-  }
-
-  if (should_close) {
-    widget_->Close();
-  } else {
-    SystemTrayBubble* bubble =
-        Shell::GetInstance()->GetPrimarySystemTray()->GetSystemBubble();
-    if (bubble)
-      bubble->bubble_view()->set_gesture_dragging(false);
-  }
-}
-
-void TrayGestureHandler::OnWidgetDestroying(views::Widget* widget) {
-  CHECK_EQ(widget_, widget);
-  widget_ = NULL;
-}
-
-}  // namespace ash