Add the ability to resize the window when over the custom frame.

chrome/browser/gtk/tabs/tab_renderer_gtk.cc

Index: chrome/browser/gtk/tabs/tab_renderer_gtk.cc
diff --git a/chrome/browser/gtk/tabs/tab_renderer_gtk.cc b/chrome/browser/gtk/tabs/tab_renderer_gtk.cc
index 2408d5564b0976d9588d34d5c976502ce0d29e19..b4456dec9e32058d54e4dbbfb32701884a84e2f1 100755
--- a/chrome/browser/gtk/tabs/tab_renderer_gtk.cc
+++ b/chrome/browser/gtk/tabs/tab_renderer_gtk.cc
@@ -515,10 +515,9 @@ void TabRendererGtk::PaintTab(GdkEventExpose* event) {
     return;
 
   // The tab is rendered into a windowless widget whose offset is at the
-  // coordinate [x(), y()].  Additionally, the parent widget is windowless, and
-  // it has an offset of event->area.  Translate by these offsets so we can
-  // render at (0,0) to match windows rendering metrics.
-  canvas.TranslateInt(x(), y() + event->area.y);
+  // coordinate event->area.  Translate by these offsets so we can render at
+  // (0,0) to match Windows' rendering metrics.
+  canvas.TranslateInt(event->area.x, event->area.y);
   Paint(&canvas);
 }