Permission bubble should not be key window when it appears.

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 200 matching lines @@
       [[PermissionBubbleWindow alloc]
           initWithContentRect:ui::kWindowSizeDeterminedLater
                     styleMask:NSBorderlessWindowMask
                       backing:NSBackingStoreBuffered
                         defer:NO]);
   [window setAllowedAnimations:info_bubble::kAnimateNone];
   if ((self = [super initWithWindow:window
                        parentWindow:parentWindow
                          anchoredAt:NSZeroPoint])) {
     [self setShouldCloseOnResignKey:NO];
+    [self setShouldOpenAsKeyWindow:NO];
     [[self bubble] setArrowLocation:info_bubble::kTopLeft];
     bridge_ = bridge;
   }
   return self;
 }
 
 - (void)windowWillClose:(NSNotification*)notification {
   bridge_->OnBubbleClosing();
   [super windowWillClose:notification];
 }
@@ 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