Draggable region support for frameless app window on GTK.

chrome/browser/ui/gtk/gtk_window_util.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_UI_GTK_GTK_WINDOW_UTIL_H_
 #define CHROME_BROWSER_UI_GTK_GTK_WINDOW_UTIL_H_
 
 #include <gtk/gtk.h>
+#include "ui/gfx/rect.h"
 
 namespace content {
 class WebContents;
 }
 
 namespace gtk_window_util {
 
 // Performs Cut/Copy/Paste operation on the |window|'s |web_contents|.
 void DoCut(GtkWindow* window, content::WebContents* web_contents);
 void DoCopy(GtkWindow* window, content::WebContents* web_contents);
 void DoPaste(GtkWindow* window, content::WebContents* web_contents);
 
 // Ubuntu patches their version of GTK+ to that there is always a
 // gripper in the bottom right corner of the window. We always need to
 // disable this feature since we can't communicate this to WebKit easily.
 void DisableResizeGrip(GtkWindow* window);
 
 // Returns the resize cursor corresponding to the window |edge|.
 GdkCursorType GdkWindowEdgeToGdkCursorType(GdkWindowEdge edge);
 
+// Returns |true| if the window bounds match the monitor size.
+bool BoundsMatchMonitorSize(GtkWindow* window, gfx::Rect bounds);
+
+bool HandleTitleBarLeftMousePress(GtkWindow* window,
+                                  const gfx::Rect& bounds,
+                                  GdkEventButton* event);
+
+// Request the underlying window to unmaximize.  Also tries to work around
+// a window manager "feature" that can prevent this in some edge cases.
+void UnMaximize(GtkWindow* window,
+                const gfx::Rect& bounds,
+                const gfx::Rect& restored_bounds);
+
 }  // namespace gtk_window_util
 
 #endif  // CHROME_BROWSER_UI_GTK_GTK_WINDOW_UTIL_H_