FullscreenExitBubble temp UI for Mac.

chrome/browser/ui/cocoa/browser_window_controller_private.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/browser_window_controller_private.h"
 
 #include <cmath>
 
 #include "base/command_line.h"
 #import "base/memory/scoped_nsobject.h"
@@ skipping 665 matching lines @@
   // We're done moving focus, so re-enable bar visibility changes.
   [self enableBarVisibilityUpdates];
 }
 
 - (void)setPresentationModeInternal:(BOOL)presentationMode
                       forceDropdown:(BOOL)forceDropdown {
   if (presentationMode == [self inPresentationMode])
     return;
 
   if (presentationMode) {
-    BOOL showDropdown = forceDropdown || [self floatingBarHasFocus];
+    BOOL fullscreen_for_tab = browser_->is_fullscreen_for_tab();
+    BOOL showDropdown = !fullscreen_for_tab &&
+        (forceDropdown || [self floatingBarHasFocus]);
     NSView* contentView = [[self window] contentView];
     presentationModeController_.reset(
         [[PresentationModeController alloc] initWithBrowserController:self]);
     [presentationModeController_ enterPresentationModeForContentView:contentView
                                  showDropdown:showDropdown];
   } else {
     [presentationModeController_ exitPresentationMode];
     presentationModeController_.reset();
   }
 
@@ skipping 86 matching lines @@
   // top chrome elements so it only sits atop the web contents. When in normal
   // mode, it needs to draw over the bookmark bar and part of the toolbar.
   [[infoBarContainerController_ view] removeFromSuperview];
   NSView* infoBarDest = [[self window] contentView];
   [infoBarDest addSubview:[infoBarContainerController_ view]
                positioned:fullscreen ? NSWindowBelow : NSWindowAbove
                relativeTo:fullscreen ? nil
                                      : [toolbarController_ view]];
 }
 
+- (void)showFullscreenExitBubbleIfNecessary {
+  if (!browser_->is_fullscreen_for_tab()) {
+    return;
+  }
+
+  [presentationModeController_ ensureOverlayHiddenWithAnimation:NO delay:NO];
+
+  fullscreenExitBubbleController_.reset(
+      [[FullscreenExitBubbleController alloc] initWithOwner:self
+                                                    browser:browser_.get()]);
+  NSView* contentView = [[self window] contentView];
+  CGFloat maxWidth = NSWidth([contentView frame]);
+  CGFloat maxY = NSMaxY([[[self window] contentView] frame]);
+  [fullscreenExitBubbleController_
+      positionInWindowAtTop:maxY width:maxWidth];
+  [contentView addSubview:[fullscreenExitBubbleController_ view]
+      positioned:NSWindowAbove relativeTo:[self tabContentArea]];
+}
+
+- (void)destroyFullscreenExitBubbleIfNecessary {
+  [[fullscreenExitBubbleController_ view] removeFromSuperview];
+  fullscreenExitBubbleController_.reset();
+}
+
 - (void)contentViewDidResize:(NSNotification*)notification {
   [self layoutSubviews];
 }
 
 - (void)registerForContentViewResizeNotifications {
   [[NSNotificationCenter defaultCenter]
       addObserver:self
          selector:@selector(contentViewDidResize:)
              name:NSViewFrameDidChangeNotification
            object:[[self window] contentView]];
@@ skipping 17 matching lines @@
           NSApplicationPresentationAutoHideDock |
           NSApplicationPresentationAutoHideMenuBar);
 }
 
 - (void)windowWillEnterFullScreen:(NSNotification*)notification {
   [self registerForContentViewResizeNotifications];
 
   NSWindow* window = [self window];
   savedRegularWindowFrame_ = [window frame];
   BOOL mode = [self shouldUsePresentationModeWhenEnteringFullscreen];
+  mode = mode || browser_->is_fullscreen_for_tab();
   [self setPresentationModeInternal:mode forceDropdown:NO];
 }
 
 - (void)windowDidEnterFullScreen:(NSNotification*)notification {
   [self deregisterForContentViewResizeNotifications];
 }
 
 - (void)windowWillExitFullScreen:(NSNotification*)notification {
   [self registerForContentViewResizeNotifications];
   [self setPresentationModeInternal:NO forceDropdown:NO];
@@ skipping 31 matching lines @@
 - (void)disableBarVisibilityUpdates {
   // Early escape if there's nothing to do.
   if (!barVisibilityUpdatesEnabled_)
     return;
 
   barVisibilityUpdatesEnabled_ = NO;
   [presentationModeController_ cancelAnimationAndTimers];
 }
 
 @end  // @implementation BrowserWindowController(Private)