[MacViews] Frameless app windows: make content view cover title bar.

chrome/browser/ui/views/apps/app_window_native_widget_mac.mm

+// Copyright 2015 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/apps/app_window_native_widget_mac.h"
+
+#import <Cocoa/Cocoa.h>
+
+#import "ui/base/cocoa/window_size_constants.h"
+#import "ui/views/cocoa/native_widget_mac_nswindow.h"
+
+AppWindowNativeWidgetMac::AppWindowNativeWidgetMac(views::Widget* widget)
+    : NativeWidgetMac(widget) {
+}
+
+AppWindowNativeWidgetMac::~AppWindowNativeWidgetMac() {
+}
+
+NSWindow* AppWindowNativeWidgetMac::CreateNSWindow(
+    views::Widget::InitParams params) {
+  if (!params.remove_standard_frame)

[tapted, 2015/03/18 00:06:39]

comment about this? (i.e. what native app window window types will have this
false? - DCHECK?)

[jackhou1, 2015/03/18 03:44:39]

Done.

+    return NativeWidgetMac::CreateNSWindow(params);
+
+  NSUInteger style_mask = NSTexturedBackgroundWindowMask | NSTitledWindowMask |

[tapted, 2015/03/18 00:06:38]

comment why NSTexturedBackgroundWindowMask is needed (i.e. just to allow moving
the window by clicking anywhere on it, when that's enabled?)

[jackhou1, 2015/03/18 03:44:39]

Done.

+                          NSClosableWindowMask | NSMiniaturizableWindowMask |
+                          NSResizableWindowMask;
+  return [[NativeWidgetMacFramelessNSWindow alloc]
+      initWithContentRect:ui::kWindowSizeDeterminedLater
+                styleMask:style_mask
+                  backing:NSBackingStoreBuffered
+                    defer:YES];

[tapted, 2015/03/18 00:06:39]

Returns from functions are typically autoreleased -- I think that's a better
approach.

[jackhou1, 2015/03/18 03:44:39]

Done.

+}