Linux: Don't vertically tile the frame background.

chrome/browser/gtk/browser_window_gtk.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/gtk/browser_window_gtk.h"
 
 #include <gdk/gdkkeysyms.h>
 #include <X11/XF86keysym.h>
 
 #include <string>
@@ skipping 638 matching lines @@
   int image_name;
   if (window->IsActive()) {
     image_name = window->browser()->profile()->IsOffTheRecord() ?
                  IDR_THEME_FRAME_INCOGNITO : IDR_THEME_FRAME;
   } else {
     image_name = window->browser()->profile()->IsOffTheRecord() ?
                  IDR_THEME_FRAME_INCOGNITO_INACTIVE : IDR_THEME_FRAME_INACTIVE;
   }
   CairoCachedSurface* surface = theme_provider->GetSurfaceNamed(
       image_name, widget);
-  surface->SetSource(cr,
-      0,
-      window->UseCustomFrame() ? 0 : -kCustomFrameBackgroundVerticalOffset);
-  cairo_pattern_set_extend(cairo_get_source(cr), CAIRO_EXTEND_REPEAT);
-  cairo_rectangle(cr, event->area.x, event->area.y,
-                      event->area.width, event->area.height);
-  cairo_fill(cr);
+  if (event->area.y < surface->Height()) {
+    surface->SetSource(cr,
+        0,
+        window->UseCustomFrame() ? 0 : -kCustomFrameBackgroundVerticalOffset);
+    // The frame background isn't tiled vertically.
+    cairo_pattern_set_extend(cairo_get_source(cr), CAIRO_EXTEND_REPEAT);
+    cairo_rectangle(cr, event->area.x, event->area.y,
+                        event->area.width, surface->Height() - event->area.y);
+    cairo_fill(cr);
+  }
 
   if (theme_provider->HasCustomImage(IDR_THEME_FRAME_OVERLAY)) {
     CairoCachedSurface* theme_overlay = theme_provider->GetSurfaceNamed(
         window->IsActive() ? IDR_THEME_FRAME_OVERLAY
                            : IDR_THEME_FRAME_OVERLAY_INACTIVE, widget);
     theme_overlay->SetSource(cr, 0, 0);
     cairo_paint(cr);
   }
 
   DrawContentShadow(cr, window);
@@ skipping 1523 matching lines @@
   // special-case the ones where the custom frame should be used.  These names
   // are taken from the WMs' source code.
   return (wm_name == "Blackbox" ||
           wm_name == "compiz" ||
           wm_name == "e16" ||  // Enlightenment DR16
           wm_name == "KWin" ||
           wm_name == "Metacity" ||
           wm_name == "Openbox" ||
           wm_name == "Xfwm4");
 }