Remove legacy draggable region code and refactor to share common draggable region code

chrome/browser/ui/gtk/extensions/shell_window_gtk.h

Index: chrome/browser/ui/gtk/extensions/shell_window_gtk.h
diff --git a/chrome/browser/ui/gtk/extensions/shell_window_gtk.h b/chrome/browser/ui/gtk/extensions/shell_window_gtk.h
index 8c5cf102d8aeaddf70be1922fdde8b5765c70c1e..5a2a84713d4d7c35a52e62189048b01d8c019b3c 100644
--- a/chrome/browser/ui/gtk/extensions/shell_window_gtk.h
+++ b/chrome/browser/ui/gtk/extensions/shell_window_gtk.h
@@ -11,7 +11,6 @@
 #include "chrome/browser/ui/extensions/native_shell_window.h"
 #include "chrome/browser/ui/extensions/shell_window.h"
 #include "chrome/browser/ui/gtk/extensions/extension_view_gtk.h"
-#include "third_party/skia/include/core/SkRegion.h"
 #include "ui/base/gtk/gtk_signal.h"
 #include "ui/base/x/active_window_watcher_x_observer.h"
 #include "ui/gfx/rect.h"
@@ -21,7 +20,6 @@ class Profile;
 
 namespace extensions {
 class Extension;
-struct DraggableRegion;
 }
 
 class ShellWindowGtk : public NativeShellWindow,
@@ -69,10 +67,6 @@ class ShellWindowGtk : public NativeShellWindow,
   const extensions::Extension* extension() const {
     return shell_window_->extension();
   }
-  virtual void UpdateDraggableRegions(
-      const std::vector<extensions::DraggableRegion>& regions) OVERRIDE;
-  virtual void UpdateLegacyDraggableRegions(
-      const std::vector<extensions::DraggableRegion>& regions) OVERRIDE;
 
   virtual ~ShellWindowGtk();
 
@@ -107,10 +101,6 @@ class ShellWindowGtk : public NativeShellWindow,
   // fullscreen, however: some WMs don't support fullscreen.
   bool content_thinks_its_fullscreen_;
 
-  // The region is treated as title bar, can be dragged to move
-  // and double clicked to maximize.
-  SkRegion draggable_region_;
-
   // If true, don't call gdk_window_raise() when we get a click in the title
   // bar or window border.  This is to work around a compiz bug.
   bool suppress_window_raise_;