[MacViews] Implement AlwaysOnTop and VisibleOnAllWorkspaces.

ui/gfx/mac/nswindow_frame_controls.h

Index: ui/gfx/mac/nswindow_frame_controls.h
diff --git a/ui/gfx/mac/nswindow_frame_controls.h b/ui/gfx/mac/nswindow_frame_controls.h
index 7ec7ab7ee0f6b7aecb549f422c51682a4d218c55..d5aaebb9d219673ae2170510f7380189093e84e3 100644
--- a/ui/gfx/mac/nswindow_frame_controls.h
+++ b/ui/gfx/mac/nswindow_frame_controls.h
@@ -5,9 +5,9 @@
 #ifndef UI_GFX_MAC_NSWINDOW_FRAME_CONTROLS_H_
 #define UI_GFX_MAC_NSWINDOW_FRAME_CONTROLS_H_
 
-#include "ui/gfx/gfx_export.h"
+#import <Cocoa/Cocoa.h>

[tapted, 2015/05/06 02:00:18]

Can you keep the forward-declare? 

[jackhou1, 2015/05/12 01:42:12]

Done.

 
-@class NSWindow;
+#include "ui/gfx/gfx_export.h"
 
 namespace gfx {
 
@@ -17,6 +17,19 @@ class Size;
 GFX_EXPORT void SetNSWindowCanFullscreen(NSWindow* window,
                                          bool allow_fullscreen);
 
+// Returns whether the window is always-on-top.
+GFX_EXPORT bool IsNSWindowAlwaysOnTop(NSWindow* window);
+
+// Sets whether the window is always-on-top. If the window is |transient| it
+// will not appear in Expose and cannot be moved between workspaces.
+GFX_EXPORT void SetNSWindowAlwaysOnTop(NSWindow* window,
+                                       bool always_on_top,
+                                       bool transient);
+
+// Sets whether the window appears on all workspaces.
+GFX_EXPORT void SetNSWindowVisibleOnAllWorkspaces(NSWindow* window,
+                                                  bool always_visible);
+
 // Sets the min/max size of the window as well as showing/hiding resize,
 // maximize, and fullscreen controls.
 // Sizes refer to the content size (inner bounds).