Attempt to fix text not being clipped. This only seems to happen in...

app/gfx/canvas_linux.cc

Index: app/gfx/canvas_linux.cc
===================================================================
--- app/gfx/canvas_linux.cc	(revision 35796)
+++ app/gfx/canvas_linux.cc	(working copy)
@@ -206,6 +206,9 @@
                            const SkColor& color,
                            int x, int y, int w, int h,
                            int flags) {
+  if (w <= 0 || h <= 0)
+    return;
+
   cairo_t* cr = beginPlatformPaint();
   PangoLayout* layout = pango_cairo_create_layout(cr);