FullscreenExitBubble temp UI for Mac.

chrome/browser/ui/cocoa/browser_window_controller.mm

Index: chrome/browser/ui/cocoa/browser_window_controller.mm
diff --git a/chrome/browser/ui/cocoa/browser_window_controller.mm b/chrome/browser/ui/cocoa/browser_window_controller.mm
index 6444bbce94fb7c45801a7a0a15062afe12f7b5b8..a0d6d8b0318d39def20ac3e9f29cfe358102fa76 100644
--- a/chrome/browser/ui/cocoa/browser_window_controller.mm
+++ b/chrome/browser/ui/cocoa/browser_window_controller.mm
@@ -1948,13 +1948,34 @@ willAnimateFromState:(bookmarks::VisualState)oldState
     enteredPresentationModeFromFullscreen_ = YES;
     if ([[self window] isKindOfClass:[FramedBrowserWindow class]])
       [static_cast<FramedBrowserWindow*>([self window]) toggleSystemFullScreen];
-    return;
+  } else {
+    if (fullscreen)
+      [self enterFullscreenForSnowLeopardOrEarlier];
+    else
+      [self exitFullscreenForSnowLeopardOrEarlier];
   }
 
-  if (fullscreen)
-    [self enterFullscreenForSnowLeopardOrEarlier];
-  else
-    [self exitFullscreenForSnowLeopardOrEarlier];
+  // Disable the floating tab bar if this fullscreen request was from a page.
+  // It will be re-enabled by the FullscreenExitBubble after the user dismisses the bubble.
+  [self setShowFloatingChrome:NO/*fullscreen && url.is_empty()*/];
+
+  if (fullscreen /*&& !url.is_empty()*/) {
+    fullscreenExitBubbleController_.reset(
+        [[FullscreenExitBubbleController alloc] initWithOwner:self browser:browser_.get()]);
+    NSView *contentView = [[self window] contentView];
+    CGFloat maxY = [self placeBookmarkBarBelowInfoBar] ?
+      NSMinY([[toolbarController_ view] frame]) :
+      NSMinY([[bookmarkBarController_ view] frame]);
+    NSRect fsebFrame = [[fullscreenExitBubbleController_ animatableView] frame];
+    CGFloat maxWidth = NSWidth([contentView frame]);
+    fsebFrame.origin.x = maxWidth/2-NSWidth(fsebFrame)/2;
+    fsebFrame.origin.y = maxY-NSHeight(fsebFrame);
+    [[fullscreenExitBubbleController_ view] setFrame:fsebFrame];
+    [contentView addSubview:[fullscreenExitBubbleController_ view]];
+  } else {
+    [[fullscreenExitBubbleController_ view] removeFromSuperview];
+    fullscreenExitBubbleController_.reset();
+  }
 }
 
 - (BOOL)isFullscreen {
@@ -2051,6 +2072,11 @@ willAnimateFromState:(bookmarks::VisualState)oldState
   [self layoutSubviews];
 }
 
+- (void)setShowFloatingChrome:(BOOL)showChrome {
+  showFloatingChrome_ = showChrome;
+  [self layoutSubviews];
+}
+
 - (BOOL)isBarVisibilityLockedForOwner:(id)owner {
   DCHECK(owner);
   DCHECK(barVisibilityLocks_);