Remove app/win/win_util.h,cc etc.

ui/base/x/x11_util.h

Index: ui/base/x/x11_util.h
diff --git a/ui/base/x/x11_util.h b/ui/base/x/x11_util.h
index 3284fcb328995967895b1129536579bb40fcc85d..e323d8be572696fc9a792cf57df7c6f429d99315 100644
--- a/ui/base/x/x11_util.h
+++ b/ui/base/x/x11_util.h
@@ -20,7 +20,6 @@
 typedef unsigned long Atom;
 typedef struct _GdkDrawable GdkWindow;
 typedef struct _GtkWidget GtkWidget;
-typedef struct _GtkWindow GtkWindow;
 typedef unsigned long XID;
 typedef unsigned long XSharedMemoryId;  // ShmSeg in the X headers.
 typedef struct _XDisplay Display;
@@ -171,11 +170,6 @@ bool GetWindowParent(XID* parent_window, bool* parent_is_root, XID window);
 // Get the window manager name.
 bool GetWindowManagerName(std::string* name);
 
-// Grabs a snapshot of the designated window and stores a PNG representation
-// into a byte vector.
-void GrabWindowSnapshot(GtkWindow* gdk_window,
-                        std::vector<unsigned char>* png_representation);
-
 // Change desktop for |window| to the desktop of |destination| window.
 bool ChangeWindowDesktop(XID window, XID destination);