MacViews: Implement Full Keyboard Access.

ui/views/cocoa/bridged_native_widget.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 "ui/views/cocoa/bridged_native_widget.h"
 
 #import <objc/runtime.h>
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 781 matching lines @@
 }
 
 void BridgedNativeWidget::OnWindowKeyStatusChangedTo(bool is_key) {
   Widget* widget = native_widget_mac()->GetWidget();
   widget->OnNativeWidgetActivationChanged(is_key);
   // The contentView is the BridgedContentView hosting the views::RootView. The
   // focus manager will already know if a native subview has focus.
   if ([window_ contentView] == [window_ firstResponder]) {
     if (is_key) {
       widget->OnNativeFocus();
+      // Explicitly set the keyboard accessibility state on regaining key
+      // window status.
+      [bridged_view_ updateFullKeyboardAccess];
       widget->GetFocusManager()->RestoreFocusedView();
     } else {
       widget->OnNativeBlur();
       widget->GetFocusManager()->StoreFocusedView(true);
     }
   }
 }
 
 bool BridgedNativeWidget::ShouldRepostPendingLeftMouseDown(
     NSPoint location_in_window) {
@@ skipping 488 matching lines @@
   [bridged_view_ setMouseDownCanMoveWindow:draggable];
   // AppKit will not update its cache of mouseDownCanMoveWindow unless something
   // changes. Previously we tried adding an NSView and removing it, but for some
   // reason it required reposting the mouse-down event, and didn't always work.
   // Calling the below seems to be an effective solution.
   [window_ setMovableByWindowBackground:NO];
   [window_ setMovableByWindowBackground:YES];
 }
 
 }  // namespace views