Linux: support displays without Xrender support.

chrome/browser/renderer_host/render_widget_host_view_gtk.cc

 // Copyright (c) 2006-2008 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/renderer_host/render_widget_host_view_gtk.h"
 
 #include <gtk/gtk.h>
 #include <gdk/gdk.h>
 #include <cairo/cairo.h>
 
@@ skipping 270 matching lines @@
   } else {
     gtk_widget_set_tooltip_text(view_, WideToUTF8(tooltip_text).c_str());
   }
 }
 
 BackingStore* RenderWidgetHostViewGtk::AllocBackingStore(
     const gfx::Size& size) {
   Display* display = x11_util::GetXDisplay();
   void* visual = x11_util::GetVisualFromGtkWidget(view_);
   XID root_window = x11_util::GetX11RootWindow();
+  bool use_render = x11_util::QueryRenderSupport(display);
   bool use_shared_memory = x11_util::QuerySharedMemorySupport(display);
   int depth = gtk_widget_get_visual(view_)->depth;
 
   return new BackingStore(size, display, depth, visual, root_window,
-                          use_shared_memory);
+                          use_render, use_shared_memory);
 }
 
 void RenderWidgetHostViewGtk::Paint(const gfx::Rect& damage_rect) {
   BackingStore* backing_store = host_->GetBackingStore();
 
   if (backing_store) {
     // Only render the widget if it is attached to a window; there's a short
     // period where this object isn't attached to a window but hasn't been
     // Destroy()ed yet and it receives paint messages...
     GdkWindow* window = view_->window;
     if (window) {
       backing_store->ShowRect(
           damage_rect, x11_util::GetX11WindowFromGtkWidget(view_));
     }
   } else {
     NOTIMPLEMENTED();
   }
 }