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

chrome/browser/ui/cocoa/extensions/shell_window_cocoa.h

Index: chrome/browser/ui/cocoa/extensions/shell_window_cocoa.h
diff --git a/chrome/browser/ui/cocoa/extensions/shell_window_cocoa.h b/chrome/browser/ui/cocoa/extensions/shell_window_cocoa.h
index 4c93bd007e3e0c8c09cf6e5950ba9d6739382475..763c0bec831b7aa10a530f81ee82092ca902eeba 100644
--- a/chrome/browser/ui/cocoa/extensions/shell_window_cocoa.h
+++ b/chrome/browser/ui/cocoa/extensions/shell_window_cocoa.h
@@ -22,7 +22,6 @@ class ExtensionKeybindingRegistryCocoa;
 class Profile;
 class ShellWindowCocoa;
 @class ShellNSWindow;
-class SkRegion;
 
 // A window controller for a minimal window to host a web app view. Passes
 // Objective-C notifications to the C++ bridge.
@@ -93,7 +92,6 @@ class ShellWindowCocoa : public NativeShellWindow {
   void HandleMouseEvent(NSEvent* event);
 
   bool use_system_drag() const { return use_system_drag_; }
-  SkRegion* draggable_region() const { return draggable_region_.get(); }
 
  protected:
   // NativeShellWindow implementation.
@@ -103,8 +101,6 @@ class ShellWindowCocoa : public NativeShellWindow {
   virtual void UpdateWindowTitle() OVERRIDE;
   virtual void UpdateDraggableRegions(
       const std::vector<extensions::DraggableRegion>& regions) OVERRIDE;
-  virtual void UpdateLegacyDraggableRegions(
-      const std::vector<extensions::DraggableRegion>& regions) OVERRIDE;
   virtual void HandleKeyboardEvent(
       const content::NativeWebKeyboardEvent& event) OVERRIDE;
 
@@ -131,8 +127,6 @@ class ShellWindowCocoa : public NativeShellWindow {
 
   ShellWindow* shell_window_; // weak - ShellWindow owns NativeShellWindow.
 
-  bool has_frame_;
-
   bool is_fullscreen_;
   NSRect restored_bounds_;
 
@@ -147,10 +141,6 @@ class ShellWindowCocoa : public NativeShellWindow {
   // have to been explicitly excluded.
   std::vector<gfx::Rect> system_drag_exclude_areas_;
 
-  // For custom drag, the whole window is non-draggable and the draggable region
-  // has to been explicitly provided.
-  scoped_ptr<SkRegion> draggable_region_;  // used in custom drag.
-
   // Mouse location since the last mouse event, in screen coordinates. This is
   // used in custom drag to compute the window movement.
   NSPoint last_mouse_location_;