MacViews: Implement Tab Dragging

ui/views/widget/native_widget_mac.mm

Index: ui/views/widget/native_widget_mac.mm
diff --git a/ui/views/widget/native_widget_mac.mm b/ui/views/widget/native_widget_mac.mm
index 61656430231141041fdf9811229efb67cd5a3370..a60da71075efc3defaf531a4aefda23fa8287cb5 100644
--- a/ui/views/widget/native_widget_mac.mm
+++ b/ui/views/widget/native_widget_mac.mm
@@ -34,6 +34,16 @@
 
 @end
 
+extern "C" {
+
+typedef int32 CGSWindow;
+typedef int32 CGSConnection;
+CGSConnection _CGSDefaultConnection();
+OSStatus CGSGetWindowBounds(
+    CGSConnection connection, CGSWindow window, CGRect* bounds);
+
+}
+
 namespace views {
 namespace {
 
@@ -50,6 +60,20 @@ NSInteger StyleMaskForParams(const Widget::InitParams& params) {
   return NSBorderlessWindowMask;
 }
 
+// -[NSWindow frame] doesn't update during a window drag. This is not what
+// toolkit-views expects, so ask the window server directly.
+NSRect FrameIncludingDrag(NSWindow* window) {
+  CGRect bounds = NSZeroRect;
+  CGSGetWindowBounds(_CGSDefaultConnection(), [window windowNumber], &bounds);
+  NSRect rect = ScreenRectToNSRect(gfx::Rect(bounds));
+
+  // If no mouse buttons are down, there is no drag. So it should match the
+  // window frame.
+  //DCHECK([NSEvent pressedMouseButtons] == 0 ||
+  //       NSEqualRects(rect, [window frame]));
+  return rect;
+}
+
 }  // namespace
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -180,7 +204,7 @@ void NativeWidgetMac::ReorderNativeViews() {
 }
 
 void NativeWidgetMac::ViewRemoved(View* view) {
-  NOTIMPLEMENTED();
+  //NOTIMPLEMENTED();
 }
 
 void NativeWidgetMac::SetNativeWindowProperty(const char* name, void* value) {
@@ -274,7 +298,7 @@ gfx::Rect NativeWidgetMac::GetWindowBoundsInScreen() const {
 gfx::Rect NativeWidgetMac::GetClientAreaBoundsInScreen() const {
   NSWindow* window = GetNativeWindow();
   return gfx::ScreenRectFromNSRect(
-      [window contentRectForFrameRect:[window frame]]);
+      [window contentRectForFrameRect:FrameIncludingDrag(window)]);
 }
 
 gfx::Rect NativeWidgetMac::GetRestoredBounds() const {
@@ -516,12 +540,18 @@ Widget::MoveLoopResult NativeWidgetMac::RunMoveLoop(
     const gfx::Vector2d& drag_offset,
     Widget::MoveLoopSource source,
     Widget::MoveLoopEscapeBehavior escape_behavior) {
-  NOTIMPLEMENTED();
-  return Widget::MOVE_LOOP_CANCELED;
+  if (!bridge_)
+    return Widget::MOVE_LOOP_CANCELED;
+
+  DLOG(INFO) << "RunMoveLoop: " << source << " , " << escape_behavior
+      << " offset=" << drag_offset.ToString();
+
+  return bridge_->RunMoveLoop(drag_offset);
 }
 
 void NativeWidgetMac::EndMoveLoop() {
-  NOTIMPLEMENTED();
+  if (bridge_)
+    bridge_->EndMoveLoop();
 }
 
 void NativeWidgetMac::SetVisibilityChangedAnimationsEnabled(bool value) {