mac: Add basic layout unit test for fullscreen transition.

chrome/browser/ui/cocoa/browser_window_controller_private.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/browser_window_controller_private.h"
 
 #include <cmath>
 
 #include "base/command_line.h"
 #include "base/mac/mac_util.h"
@@ skipping 284 matching lines @@
   // Normally, we don't need to tell the toolbar whether or not to show the
   // divider, but things break down during animation.
   [toolbarController_ setDividerOpacity:[self toolbarDividerOpacity]];
 }
 
 - (CGFloat)floatingBarHeight {
   if (![self isInFullscreenWithOmniboxSliding])
     return 0;
 
   CGFloat totalHeight = 0;
-  if (presentationModeController_)
-    totalHeight = [presentationModeController_ floatingBarVerticalOffset];
-
   if ([self hasTabStrip])
     totalHeight += NSHeight([[self tabStripView] frame]);
 
   if ([self hasToolbar]) {
     totalHeight += NSHeight([[toolbarController_ view] frame]);
   } else if ([self hasLocationBar]) {
     totalHeight += NSHeight([[toolbarController_ view] frame]) +
                    kLocBarTopInset + kLocBarBottomInset;
   }
 
@@ skipping 405 matching lines @@
   presentationModeController_.reset();
 
   // Force the bookmark bar z-order to update.
   [[bookmarkBarController_ view] removeFromSuperview];
   [self layoutSubviews];
 }
 
 - (void)adjustUIForSlidingFullscreenStyle:(fullscreen_mac::SlidingStyle)style {
   if (!presentationModeController_) {
     presentationModeController_.reset(
-        [[PresentationModeController alloc] initWithBrowserController:self
-                                                                style:style]);
+        [self newPresentationModeControllerWithStyle:style]);
     [self configurePresentationModeController];
   } else {
     presentationModeController_.get().slidingStyle = style;
   }
 
   if (!floatingBarBackingView_.get() &&
       ([self hasTabStrip] || [self hasToolbar] || [self hasLocationBar])) {
     floatingBarBackingView_.reset(
         [[FloatingBarBackingView alloc] initWithFrame:NSZeroRect]);
     [floatingBarBackingView_
         setAutoresizingMask:(NSViewWidthSizable | NSViewMinYMargin)];
   }
 
   // Force the bookmark bar z-order to update.
   [[bookmarkBarController_ view] removeFromSuperview];
   [self layoutSubviews];
 }
 
+- (PresentationModeController*)newPresentationModeControllerWithStyle:
+    (fullscreen_mac::SlidingStyle)style {
+  return [[PresentationModeController alloc] initWithBrowserController:self
+                                                                 style:style];
+}
+
 - (void)enterImmersiveFullscreen {
   // Set to NO by |-windowDidEnterFullScreen:|.
   enteringImmersiveFullscreen_ = YES;
 
   // Fade to black.
   const CGDisplayReservationInterval kFadeDurationSeconds = 0.6;
   Boolean didFadeOut = NO;
   CGDisplayFadeReservationToken token;
   if (CGAcquireDisplayFadeReservation(kFadeDurationSeconds, &token)
       == kCGErrorSuccess) {
@@ skipping 416 matching lines @@
 
 - (void)exitAppKitFullscreen {
   DCHECK(base::mac::IsOSLionOrLater());
   if (FramedBrowserWindow* framedBrowserWindow =
           base::mac::ObjCCast<FramedBrowserWindow>([self window])) {
     [framedBrowserWindow toggleSystemFullScreen];
   }
 }
 
 @end  // @implementation BrowserWindowController(Private)