[MacViews] Implement size constraints for app windows.

chrome/browser/ui/cocoa/apps/native_app_window_cocoa_browsertest.mm

 // Copyright 2013 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.
 
 // This file tests whichever implementation of NativeAppWindow is used.
 // I.e. it could be NativeAppWindowCocoa or ChromeNativeAppWindowViewsMac.
 #include "extensions/browser/app_window/native_app_window.h"
 
 #import <Cocoa/Cocoa.h>
 
@@ skipping 222 matching lines @@
 
   // Since the window has no constraints, it should have all of the following
   // style mask bits.
   NSUInteger style_mask = NSTitledWindowMask | NSClosableWindowMask |
                           NSMiniaturizableWindowMask | NSResizableWindowMask |
                           NSTexturedBackgroundWindowMask;
   EXPECT_EQ(style_mask, [ns_window styleMask]);
 
   CloseAppWindow(app_window);
 }
+
+// Test that resize and fullscreen controls are correctly enabled/disabled.
+IN_PROC_BROWSER_TEST_F(NativeAppWindowCocoaBrowserTest, Controls) {
+  extensions::AppWindow* app_window = CreateTestAppWindow("{}");
+  NSWindow* ns_window = app_window->GetNativeWindow();
+
+  // The window is resizable.
+  EXPECT_TRUE([ns_window styleMask] & NSResizableWindowMask);
+  if (base::mac::IsOSSnowLeopard())
+    EXPECT_TRUE([ns_window showsResizeIndicator]);
+
+  // The window can fullscreen and maximize.
+  if (base::mac::IsOSLionOrLater())
+    EXPECT_TRUE([ns_window collectionBehavior] &
+                NSWindowCollectionBehaviorFullScreenPrimary);
+  EXPECT_TRUE([[ns_window standardWindowButton:NSWindowZoomButton] isEnabled]);
+
+  // Set a maximum size.
+  app_window->SetContentSizeConstraints(gfx::Size(), gfx::Size(200, 201));
+  EXPECT_EQ(200, [ns_window frame].size.width);
+  EXPECT_EQ(201, [ns_window frame].size.height);
+  EXPECT_EQ(200, [ns_window contentMaxSize].width);
+  EXPECT_EQ(201, [ns_window contentMaxSize].height);
+
+  // Still resizable.
+  EXPECT_TRUE([ns_window styleMask] & NSResizableWindowMask);
+  if (base::mac::IsOSSnowLeopard())
+    EXPECT_TRUE([ns_window showsResizeIndicator]);
+
+  // Fullscreen and maximize are disabled.
+  if (base::mac::IsOSLionOrLater())
+    EXPECT_FALSE([ns_window collectionBehavior] &
+                 NSWindowCollectionBehaviorFullScreenPrimary);
+  EXPECT_FALSE([[ns_window standardWindowButton:NSWindowZoomButton] isEnabled]);
+
+  // Set a minimum size equal to the maximum size.
+  app_window->SetContentSizeConstraints(gfx::Size(200, 201),
+                                        gfx::Size(200, 201));
+  EXPECT_EQ(200, [ns_window contentMinSize].width);
+  EXPECT_EQ(201, [ns_window contentMinSize].height);
+
+  // No longer resizable.
+  EXPECT_FALSE([ns_window styleMask] & NSResizableWindowMask);
+  if (base::mac::IsOSSnowLeopard())
+    EXPECT_FALSE([ns_window showsResizeIndicator]);
+}