MacViews: Handling changing of first responder inside NativeWidgetMac.

ui/views/cocoa/bridged_content_view.mm

Index: ui/views/cocoa/bridged_content_view.mm
diff --git a/ui/views/cocoa/bridged_content_view.mm b/ui/views/cocoa/bridged_content_view.mm
index 6022a44723bf99d9873d04bd6dcbebdb7bc66697..d3078ec5f434c7df535b6a190446de550ce07e49 100644
--- a/ui/views/cocoa/bridged_content_view.mm
+++ b/ui/views/cocoa/bridged_content_view.mm
@@ -407,6 +407,24 @@ gfx::Rect GetFirstRectForRangeHelper(const ui::TextInputClient* client,
   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.