Aura/ash split: Don't use X11 window borders.

ui/aura/root_window_host_linux.h

Index: ui/aura/root_window_host_linux.h
diff --git a/ui/aura/root_window_host_linux.h b/ui/aura/root_window_host_linux.h
index ae435e98fa7b2401c30a3b688626e0941de31bb9..7851fe286a6f98833fa16281f267a1a9f9f866b6 100644
--- a/ui/aura/root_window_host_linux.h
+++ b/ui/aura/root_window_host_linux.h
@@ -51,6 +51,9 @@ class RootWindowHostLinux : public RootWindowHost,
   virtual void MoveCursorTo(const gfx::Point& location) OVERRIDE;
   virtual void SetFocusWhenShown(bool focus_when_shown) OVERRIDE;
   virtual void PostNativeEvent(const base::NativeEvent& event) OVERRIDE;
+  virtual void SetUseHostWindowBorders(bool use_os_borders) OVERRIDE;
+  virtual bool DispatchHostWindowDragMovement(int hittest,
+                                              MouseEvent* event) OVERRIDE;
 
   // Returns true if there's an X window manager present... in most cases.  Some
   // window managers (notably, ion3) don't implement enough of ICCCM for us to
@@ -61,6 +64,10 @@ class RootWindowHostLinux : public RootWindowHost,
   // |current_cursor_|.
   void SetCursorInternal(gfx::NativeCursor cursor);
 
+  // Signal to the window manager that it is to move the window as we've had a
+  // hit in our non-client area.
+  void SendWMMoveResize(int direction, int x_root, int y_root);
+
   RootWindow* root_window_;
 
   // The display and the native X window hosting the root window.
@@ -86,10 +93,13 @@ class RootWindowHostLinux : public RootWindowHost,
   // round trips to the X11 server.
   enum AtomList {
     ATOM_WM_DELETE_WINDOW = 0,
+    ATOM__NET_WM_MOVERESIZE,
     ATOM__NET_WM_PING,
     ATOM__NET_WM_PID,
     ATOM_WM_S0,
 
+    ATOM__MOTIF_WM_HINTS,
+
     ATOM_COUNT
   };
   ::Atom cached_atoms_[ATOM_COUNT];