Don't flip video_decode_accelerator_unittest output if GLSurface already flips it.

media/gpu/rendering_helper.cc

 // Copyright 2013 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 "media/gpu/rendering_helper.h"
 
 #include <string.h>
 
 #include <algorithm>
 #include <memory>
@@ skipping 717 matching lines @@
   // It's safe to use Unretained here since |rendering_thread_| will be stopped
   // in VideoDecodeAcceleratorTest.TearDown(), while the |rendering_helper_| is
   // a member of that class. (See video_decode_accelerator_unittest.cc.)
   gfx::VSyncProvider* vsync_provider = gl_surface_->GetVSyncProvider();
   if (vsync_provider && !ignore_vsync_) {
     vsync_provider->GetVSyncParameters(base::Bind(
         &RenderingHelper::UpdateVSyncParameters, base::Unretained(this),
         static_cast<base::WaitableEvent*>(NULL)));
   }
 
-  int tex_flip = 1;
+  int tex_flip = !gl_surface_->FlipsVertically();
 #if defined(USE_OZONE)
   // Ozone surfaceless renders flipped from normal GL, so there's no need to
   // do an extra flip.
   tex_flip = 0;
 #endif  // defined(USE_OZONE)
   glUniform1i(glGetUniformLocation(program_, "tex_flip"), tex_flip);
 
   // Frames that will be returned to the client (via the no_longer_needed_cb)
   // after this vector falls out of scope at the end of this method. We need
   // to keep references to them until after SwapBuffers() call below.
@@ skipping 134 matching lines @@
   // When the rendering falls behind, drops frames.
   while (scheduled_render_time_ < target) {
     scheduled_render_time_ += frame_duration_;
     DropOneFrameForAllVideos();
   }
 
   message_loop_->task_runner()->PostDelayedTask(
       FROM_HERE, render_task_.callback(), target - now);
 }
 }  // namespace media