MacViews: Handling changing of first responder inside NativeWidgetMac.

ui/views/cocoa/bridged_content_view.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_content_view.h"
 
 #include "base/logging.h"
 #import "base/mac/mac_util.h"
 #import "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 389 matching lines @@
 
   hostedView_->GetWidget()->OnMouseEvent(&event);
 }
 
 // NSView implementation.
 
 - (BOOL)acceptsFirstResponder {
   return YES;
 }
 
+- (BOOL)becomeFirstResponder {
+  BOOL result = [super becomeFirstResponder];
+  if (result) {

[tapted, 2016/03/04 00:56:19]

We need to check for |hostedView_| being null since it's not refcounted, so has
a different lifetime.

perhaps for these,

  BOOL result = [super becomeFirstResponder];
  if (!result || !hostedView_)
    return result;

then, e.g.,
  hostedView_->GetWidget()->GetFocusManager()->RestoreFocusedView();

[kirr, 2016/03/04 08:31:30]

Done. Thanks.

+    views::Widget* widget = hostedView_->GetWidget();
+    widget->GetFocusManager()->RestoreFocusedView();
+  }
+  return result;
+}
+
+- (BOOL)resignFirstResponder {
+  BOOL result = [super resignFirstResponder];
+  if (result) {
+    views::Widget* widget = hostedView_->GetWidget();
+    widget->GetFocusManager()->StoreFocusedView(true);
+  }
+  return result;
+}
+
 - (void)viewDidMoveToWindow {
   // When this view is added to a window, AppKit calls setFrameSize before it is
   // added to the window, so the behavior in setFrameSize is not triggered.
   NSWindow* window = [self window];
   if (window)
     [self setFrameSize:NSZeroSize];
 }
 
 - (void)setFrameSize:(NSSize)newSize {
   // The size passed in here does not always use
@@ skipping 484 matching lines @@
   }
 
   return [super accessibilityAttributeValue:attribute];
 }
 
 - (id)accessibilityHitTest:(NSPoint)point {
   return [hostedView_->GetNativeViewAccessible() accessibilityHitTest:point];
 }
 
 @end