[MacViews] Fix behavior of non-resizable windows in fullscreen.

ui/base/test/nswindow_fullscreen_notification_waiter.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.
+
+#import "ui/base/test/nswindow_fullscreen_notification_waiter.h"
+
+#import "base/mac/sdk_forward_declarations.h"
+
+@interface NSWindowFullscreenNotificationWaiter ()
+// Exit the RunLoop if there is one and the counts being tracked match.
+- (void)maybeQuitForChangedArg:(int*)changedArg;
+- (void)onEnter:(NSNotification*)notification;
+- (void)onExit:(NSNotification*)notification;
+@end
+
+@implementation NSWindowFullscreenNotificationWaiter
+
+@synthesize enterCount = enterCount_;
+@synthesize exitCount = exitCount_;
+
+- (id)initWithWindow:(NSWindow*)window {
+  if ((self = [super init])) {
+    window_.reset([window retain]);
+    NSNotificationCenter* defaultCenter = [NSNotificationCenter defaultCenter];
+    [defaultCenter addObserver:self
+                      selector:@selector(onEnter:)
+                          name:NSWindowDidEnterFullScreenNotification
+                        object:window];
+    [defaultCenter addObserver:self
+                      selector:@selector(onExit:)
+                          name:NSWindowDidExitFullScreenNotification
+                        object:window];
+  }
+  return self;
+}
+
+- (void)dealloc {
+  DCHECK(!runLoop_);
+  [[NSNotificationCenter defaultCenter] removeObserver:self];
+  [super dealloc];
+}
+
+- (void)waitForEnterCount:(int)enterCount exitCount:(int)exitCount {
+  if (enterCount_ >= enterCount && exitCount_ >= exitCount)
+    return;
+
+  targetEnterCount_ = enterCount;
+  targetExitCount_ = exitCount;
+  runLoop_.reset(new base::RunLoop);
+  runLoop_->Run();
+  runLoop_.reset();
+}
+
+- (void)maybeQuitForChangedArg:(int*)changedArg {
+  ++*changedArg;
+  if (!runLoop_)
+    return;
+
+  if (enterCount_ >= targetEnterCount_ && exitCount_ >= targetExitCount_)
+    runLoop_->Quit();
+}
+
+- (void)onEnter:(NSNotification*)notification {
+  [self maybeQuitForChangedArg:&enterCount_];
+}
+
+- (void)onExit:(NSNotification*)notification {
+  [self maybeQuitForChangedArg:&exitCount_];
+}
+
+@end