Fix right edge bounds for panel position.

ash/wm/panel_layout_manager.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/panel_layout_manager.h"
 
 #include <algorithm>
 #include <map>
 
 #include "ash/launcher/launcher.h"
@@ skipping 353 matching lines @@
             aura::client::GetFocusClient(panel)->GetFocusedWindow())) {
       DCHECK(!active_panel);
       active_panel = panel;
     }
     icon_bounds = ScreenAsh::ConvertRectFromScreen(panel_container_,
                                                    icon_bounds);
     gfx::Point icon_origin = icon_bounds.origin();
     VisiblePanelPositionInfo position_info;
     position_info.min_x = std::max(panel_left_bounds, icon_origin.x() +
         icon_bounds.width() - panel->bounds().width());
-    position_info.max_x = std::min(icon_origin.x(), panel_right_bounds -
-                                   kPanelIdealSpacing);
+    position_info.max_x = std::min(icon_origin.x(),
+                                   panel_right_bounds - kPanelIdealSpacing -
+                                   panel->bounds().width());
     position_info.x = icon_origin.x() + icon_bounds.width() / 2 -
                       panel->bounds().width() / 2;
     position_info.width = panel->bounds().width();
     position_info.window = panel;
     visible_panels.push_back(position_info);
   }
 
   // Sort panels by their X positions and fan out groups of overlapping panels.
   // The fan out method may result in new overlapping panels however given that
   // the panels start at least a full panel width apart this overlap will
@@ skipping 101 matching lines @@
       callout_widget_->GetNativeWindow()->parent(),
       callout_bounds);
 
   SetChildBoundsDirect(callout_widget_->GetNativeWindow(), callout_bounds);
   panel_container_->StackChildAtTop(callout_widget_->GetNativeWindow());
   callout_widget_->Show();
 }
 
 }  // namespace internal
 }  // namespace ash