Remove "Alternate frame caption button style" command line flag

ash/wm/workspace/workspace_window_resizer.cc

 // 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/workspace/workspace_window_resizer.h"
 
 #include <algorithm>
 #include <cmath>
 #include <utility>
 #include <vector>
@@ skipping 893 matching lines @@
   snap_type_ = GetSnapType(location);
   if (snap_type_ == SNAP_NONE || snap_type_ != last_type) {
     snap_phantom_window_controller_.reset();
     edge_cycler_.reset();
     if (snap_type_ == SNAP_NONE) {
       SetDraggedWindowDocked(false);
       return;
     }
   }
 
-  const bool can_dock = dock_layout_->CanDockWindow(GetTarget(), snap_type_) &&
+  DCHECK(snap_type_ == SNAP_LEFT || snap_type_ == SNAP_RIGHT);
+  DockedAlignment desired_alignment = (snap_type_ == SNAP_LEFT) ?
+      DOCKED_ALIGNMENT_LEFT : DOCKED_ALIGNMENT_RIGHT;
+  const bool can_dock =
+      dock_layout_->CanDockWindow(GetTarget(), desired_alignment) &&
       dock_layout_->GetAlignmentOfWindow(GetTarget()) != DOCKED_ALIGNMENT_NONE;
   if (!can_dock) {
     // If the window cannot be docked, undock the window. This may change the
     // workspace bounds and hence |snap_type_|.
     SetDraggedWindowDocked(false);
     snap_type_ = GetSnapType(location);
   }
   const bool can_snap = snap_type_ != SNAP_NONE && window_state()->CanSnap();
   if (!can_snap && !can_dock) {
     snap_type_ = SNAP_NONE;
@@ skipping 58 matching lines @@
   parent->StackChildAtTop(map.rbegin()->second);
   for (IndexToWindowMap::const_reverse_iterator i = map.rbegin();
        i != map.rend(); ) {
     aura::Window* window = i->second;
     ++i;
     if (i != map.rend())
       parent->StackChildBelow(i->second, window);
   }
 }
 
-SnapType WorkspaceWindowResizer::GetSnapType(
+WorkspaceWindowResizer::SnapType WorkspaceWindowResizer::GetSnapType(
     const gfx::Point& location) const {
   // TODO: this likely only wants total display area, not the area of a single
   // display.
   gfx::Rect area(ScreenUtil::GetDisplayWorkAreaBoundsInParent(GetTarget()));
   if (details().source == aura::client::WINDOW_MOVE_SOURCE_TOUCH) {
     // Increase tolerance for touch-snapping near the screen edges. This is only
     // necessary when the work area left or right edge is same as screen edge.
     gfx::Rect display_bounds(ScreenUtil::GetDisplayBoundsInParent(GetTarget()));
     int inset_left = 0;
     if (area.x() == display_bounds.x())
@@ skipping 31 matching lines @@
          snapped_type == wm::WINDOW_STATE_TYPE_RIGHT_SNAPPED);
   gfx::Rect snapped_bounds = ScreenUtil::GetDisplayWorkAreaBoundsInParent(
       GetTarget());
   if (snapped_type == wm::WINDOW_STATE_TYPE_RIGHT_SNAPPED)
     snapped_bounds.set_x(snapped_bounds.right() - bounds_in_parent.width());
   snapped_bounds.set_width(bounds_in_parent.width());
   return bounds_in_parent == snapped_bounds;
 }
 
 }  // namespace ash