MacViews: Implement Tab Dragging

ui/views/widget/native_widget_mac.h

Index: ui/views/widget/native_widget_mac.h
diff --git a/ui/views/widget/native_widget_mac.h b/ui/views/widget/native_widget_mac.h
index 1b7deb2c801128cd441559203173641bb9f24976..8e8fc6146307e05bcefce07e86d5e1dd2a75eea9 100644
--- a/ui/views/widget/native_widget_mac.h
+++ b/ui/views/widget/native_widget_mac.h
@@ -47,6 +47,9 @@ class VIEWS_EXPORT NativeWidgetMac : public internal::NativeWidgetPrivate {
   // from the bottom of the window.
   virtual int SheetPositionY();
 
+  // Returns the actual frame as the WindowServer sees it.
+  gfx::Rect WindowServerFrame() const;

[tapted, 2016/04/13 08:28:13]

Can this go on BridgedNativeWidget instead?

It's fine for NativeWidgetMac to call bridge_->WindowServerFrame.
(NativeWidgetMac should be lightweight, since things in chrome/browser can
inherit from it, and it will be harder to share stuff we put on it when we need
things for aura)

And I think it should be something like

NSRect BridgedNativeWidget::GetFrameIncludingLiveDrag() {
  if (IsRunMoveLoopActive()) {
    return WindowServerFrame(window_);
  }
  return [window_ frame];
}

WindowServerFrame can probably be put in an anonymous namespace, or even
integrated into GetFrameIncludingLiveDrag()


this will allow GetWindowBoundsInScreen and GetClientAreaBoundsInScreen to share
more logic

[themblsha, 2016/04/18 09:30:02]

Well, I moved it to BridgedNativeWidget, as it uses WindowServerFrame() after
-setFrame: in a DCHECK.

+
   // internal::NativeWidgetPrivate:
   void InitNativeWidget(const Widget::InitParams& params) override;
   void OnWidgetInitDone() override;