ozone: dri: Remove CHECK failure on page flip failure

ui/ozone/platform/dri/dri_surface_factory.cc

 // Copyright 2014 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 "ui/ozone/platform/dri/dri_surface_factory.h"
 
 #include <drm.h>
 #include <errno.h>
 #include <xf86drm.h>
 
@@ skipping 97 matching lines @@
 
   // The DriSurface is double buffered, so the current back buffer is
   // missing the previous update. Expand damage region.
   SkRect real_damage = RectToSkRect(UnionRects(damage, last_damage_));
 
   // Copy damage region.
   skia::RefPtr<SkImage> image = skia::AdoptRef(surface_->newImageSnapshot());
   image->draw(canvas, &real_damage, real_damage, NULL);
 
   last_damage_ = damage;
-  CHECK(dri_->SchedulePageFlip(widget_));
+  dri_->SchedulePageFlip(widget_);
 }
 
 scoped_ptr<gfx::VSyncProvider> DriSurfaceAdapter::CreateVSyncProvider() {
   return dri_->CreateVSyncProvider(widget_);
 }
 
 }  // namespace
 
 // static
 const gfx::AcceleratedWidget DriSurfaceFactory::kDefaultWidgetHandle = 1;
@@ skipping 243 matching lines @@
 
 HardwareDisplayController* DriSurfaceFactory::GetControllerForWidget(
     gfx::AcceleratedWidget w) {
   CHECK_GE(w, 1);
   CHECK_LE(static_cast<size_t>(w), controllers_.size());
 
   return controllers_[w - 1];
 }
 
 }  // namespace ui