Don't use drag to corner resizing for unresizable windows

ash/wm/window_util.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/window_util.h"
 
 #include <vector>
 
 #include "ash/ash_constants.h"
 #include "ash/shell.h"
@@ skipping 61 matching lines @@
     return false;
   aura::client::ActivationClient* client =
       aura::client::GetActivationClient(window->GetRootWindow());
   return client && client->CanActivateWindow(window);
 }
 
 bool CanMaximizeWindow(const aura::Window* window) {
   return window->GetProperty(aura::client::kCanMaximizeKey);
 }
 
+bool CanResizeWindow(const aura::Window* window) {
+  return window->GetProperty(aura::client::kCanResizeKey);
+}
+
 bool IsWindowNormal(const aura::Window* window) {
   return IsWindowStateNormal(window->GetProperty(aura::client::kShowStateKey));
 }
 
 bool IsWindowStateNormal(ui::WindowShowState state) {
   return state == ui::SHOW_STATE_NORMAL || state == ui::SHOW_STATE_DEFAULT;
 }
 
 bool IsWindowMaximized(const aura::Window* window) {
   return window->GetProperty(aura::client::kShowStateKey) ==
@@ skipping 108 matching lines @@
       x_offset = work_area.right() - bounds->x() - kMinimumOnScreenArea;
     } else if (bounds->right() < work_area.x()) {
       x_offset = work_area.x() - bounds->right() + kMinimumOnScreenArea;
     }
     bounds->Offset(x_offset, y_offset);
   }
 }
 
 }  // namespace wm
 }  // namespace ash