Close the media picker window when DesktopMediaPickerController is destructed.

chrome/browser/ui/cocoa/media_picker/desktop_media_picker_controller.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.
 
 #import "chrome/browser/ui/cocoa/media_picker/desktop_media_picker_controller.h"
 
 #include "base/bind.h"
 #import "base/mac/bundle_locations.h"
 #include "base/strings/sys_string_conversions.h"
 #import "chrome/browser/ui/cocoa/media_picker/desktop_media_picker_item.h"
@@ skipping 67 matching lines @@
     bridge_.reset(new DesktopMediaPickerBridge(self));
   }
   return self;
 }
 
 - (void)dealloc {
   [shareButton_ setTarget:nil];
   [cancelButton_ setTarget:nil];
   [sourceBrowser_ setDelegate:nil];
   [sourceBrowser_ setDataSource:nil];
+  [[self window] close];
   [super dealloc];
 }
 
 - (void)initializeContentsWithAppName:(const base::string16&)appName
                            targetName:(const base::string16&)targetName {
   // Use flipped coordinates to facilitate manual layout.
   const CGFloat kPaddedWidth = kInitialContentWidth - (kFramePadding * 2);
   base::scoped_nsobject<FlippedView> content(
       [[FlippedView alloc] initWithFrame:NSZeroRect]);
   [[self window] setContentView:content];
@@ skipping 214 matching lines @@
 - (void)sourceThumbnailChangedAtIndex:(int)index {
   const DesktopMediaList::Source& source = media_list_->GetSource(index);
   NSImage* image = gfx::NSImageFromImageSkia(source.thumbnail);
 
   DesktopMediaPickerItem* item = [items_ objectAtIndex:index];
   [item setImageRepresentation:image];
   [sourceBrowser_ reloadData];
 }
 
 @end  // @interface DesktopMediaPickerController