Re-anchors the permission bubble when its parent window has moved.

chrome/browser/ui/cocoa/website_settings/permission_bubble_controller.mm

 // Copyright 2014 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/website_settings/permission_bubble_controller.h"
 
 #include <algorithm>
 
 #include "base/mac/bind_objc_block.h"
 #include "base/mac/foundation_util.h"
@@ skipping 226 matching lines @@
                         defer:NO]);
   [window setAllowedAnimations:info_bubble::kAnimateNone];
   [window setReleasedWhenClosed:NO];
   if ((self = [super initWithWindow:window
                        parentWindow:parentWindow
                          anchoredAt:NSZeroPoint])) {
     [self setShouldCloseOnResignKey:NO];
     [self setShouldOpenAsKeyWindow:NO];
     [[self bubble] setArrowLocation:info_bubble::kTopLeft];
     bridge_ = bridge;
+    NSNotificationCenter* center = [NSNotificationCenter defaultCenter];
+    [center addObserver:self
+               selector:@selector(parentWindowDidMove:)
+                   name:NSWindowDidMoveNotification
+                 object:parentWindow];
   }
   return self;
 }
 
 - (void)windowWillClose:(NSNotification*)notification {
   bridge_->OnBubbleClosing();
   [super windowWillClose:notification];
 }
 
 - (void)parentWindowWillBecomeFullScreen:(NSNotification*)notification {
   // Override the base class implementation, which would have closed the bubble.
 }
 
 - (void)parentWindowDidResize:(NSNotification*)notification {
   DCHECK(bridge_);
   [self setAnchorPoint:bridge_->GetAnchorPoint()];
 }
 
+- (void)parentWindowDidMove:(NSNotification*)notification {
+  DCHECK(bridge_);
+  [self setAnchorPoint:bridge_->GetAnchorPoint()];
+}
+
 - (void)showAtAnchor:(NSPoint)anchorPoint
          withDelegate:(PermissionBubbleView::Delegate*)delegate
           forRequests:(const std::vector<PermissionBubbleRequest*>&)requests
          acceptStates:(const std::vector<bool>&)acceptStates
     customizationMode:(BOOL)customizationMode {
   DCHECK(!requests.empty());
   DCHECK(delegate);
   DCHECK(!customizationMode || (requests.size() == acceptStates.size()));
   delegate_ = delegate;
 
@@ skipping 311 matching lines @@
 
 + (void)alignCenterOf:(NSView*)viewA verticallyToCenterOf:(NSView*)viewB {
   NSRect frameA = [viewA frame];
   NSRect frameB = [viewB frame];
   frameA.origin.y =
       NSMinY(frameB) + std::floor((NSHeight(frameB) - NSHeight(frameA)) / 2);
   [viewA setFrameOrigin:frameA.origin];
 }
 
 @end  // implementation PermissionBubbleController