aura: Avoid resizing when dragging top of browser frame.

chrome/browser/ui/views/frame/browser_non_client_frame_view_aura.cc

 // Copyright (c) 2011 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 "chrome/browser/ui/views/frame/browser_non_client_frame_view_aura.h"
 
 #include "chrome/browser/ui/views/frame/browser_frame.h"
 #include "chrome/browser/ui/views/frame/browser_view.h"
 #include "grit/generated_resources.h"  // Accessibility names
 #include "grit/ui_resources.h"
@@ skipping 219 matching lines @@
     return HTMAXBUTTON;
   if (HitVisibleView(close_button_, point))
     return HTCLOSE;
 
   int frame_component = GetWidget()->client_view()->NonClientHitTest(point);
   if (frame_component != HTNOWHERE)
     return frame_component;
 
   // Test window resize components.
   bool can_resize = GetWidget()->widget_delegate()->CanResize();
+  // TODO(derat): Disallow resizing via the top border in the Aura shell
+  // instead of enforcing it here.  See http://crbug.com/101830.
   frame_component = GetHTComponentForFrame(point,
+                                           0,
                                            kResizeBorderThickness,
                                            kResizeBorderThickness,
                                            kResizeBorderThickness,
-                                           kResizeBorderThickness,
                                            can_resize);
   if (frame_component != HTNOWHERE)
     return frame_component;
   // Use HTCAPTION as a final fallback.
   return HTCAPTION;
 }
 
 // Pass |active_window| explicitly because deactivating a window causes
 // OnWidgetActivationChanged() to be called before GetWidget()->IsActive()
 // changes state.
@@ skipping 259 matching lines @@
     views::Widget* widget, bool active) {
   // Active windows have different background bounds.
   UpdateFrameBackground(active);
   if (active)
     frame_background_->Show();
   else
     frame_background_->Hide();
   maximize_button_->SetVisible(active);
   close_button_->SetVisible(active);
 }