Clean up .gypi and no-op GetCompositingSurface on TOUCH_UI.

chrome/browser/renderer_host/render_widget_host_view_views_touch.cc

 // Copyright (c) 2011 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_views.h"
 
 #include "base/logging.h"
 #include "chrome/browser/renderer_host/accelerated_surface_container_touch.h"
 #include "content/browser/renderer_host/render_widget_host.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/gtk/WebInputEventFactory.h"
@@ skipping 172 matching lines @@
 // static
 RenderWidgetHostView*
     RenderWidgetHostView::GetRenderWidgetHostViewFromNativeView(
         gfx::NativeView widget) {
   // TODO(beng): Figure out what to do here for Windows/v.o.v.
   gpointer user_data = g_object_get_data(G_OBJECT(widget),
                                          kRenderWidgetHostViewKey);
   return reinterpret_cast<RenderWidgetHostView*>(user_data);
 }
 
+gfx::PluginWindowHandle RenderWidgetHostViewViews::GetCompositingSurface() {
+  // On TOUCH_UI builds, the GPU process renders to an offscreen surface
+  // (created by the GPU process), which is later displayed by the browser.
+  // As the GPU process creates this surface, we can return any non-zero value.
+  return 1;
+}
+
 void RenderWidgetHostViewViews::AcceleratedSurfaceSetIOSurface(
     int32 width, int32 height, uint64 surface_id) {
   accelerated_surface_containers_[surface_id] =
     new AcceleratedSurfaceContainerTouch(
         static_cast<ui::CompositorGL*>(GetWidget()->GetCompositor()),
         gfx::Size(width, height),
         surface_id);
 }
 
 void RenderWidgetHostViewViews::AcceleratedSurfaceRelease(uint64 surface_id) {
   accelerated_surface_containers_.erase(surface_id);
 }
 
 void RenderWidgetHostViewViews::AcceleratedSurfaceBuffersSwapped(
     uint64 surface_id) {
   SetExternalTexture(accelerated_surface_containers_[surface_id].get());
   glFlush();
 }