Linux Aura: Fix shadows on frameless windows

content/browser/browser_main_loop.cc

 // Copyright (c) 2012 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 "content/browser/browser_main_loop.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <utility>
@@ skipping 735 matching lines @@
 
   // 1) Need to initialize in-process GpuDataManager before creating threads.
   // It's unsafe to append the gpu command line switches to the global
   // CommandLine::ForCurrentProcess object after threads are created.
   // 2) Must be after parts_->PreCreateThreads to pick up chrome://flags.
   GpuDataManagerImpl::GetInstance()->Initialize();
 
 #if defined(USE_X11) && !defined(OS_CHROMEOS)
   // PreCreateThreads is called before CreateStartupTasks which starts the gpu
   // process.
-  bool enable_transparent_visuals =
-      !GpuDataManagerImpl::GetInstance()->IsDriverBugWorkaroundActive(
-          gpu::DISABLE_TRANSPARENT_VISUALS);
+  bool enable_transparent_visuals = false;
 
   // Prevent this flag to be turned off later since it is only used here.
-  if (!enable_transparent_visuals &&
-      !GpuDataManagerImpl::GetInstance()->IsCompleteGpuInfoAvailable()) {
+  if (!GpuDataManagerImpl::GetInstance()->IsCompleteGpuInfoAvailable()) {
     base::CommandLine::ForCurrentProcess()->AppendSwitch(
         "disable_transparent_visuals");
   }
 
   Visual* visual = NULL;
   int depth = 0;
   ui::ChooseVisualForWindow(enable_transparent_visuals, &visual, &depth);
   DCHECK(depth > 0);
   base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
       switches::kWindowDepth, base::IntToString(depth));
@@ skipping 767 matching lines @@
     scoped_refptr<base::SingleThreadTaskRunner> worker_task_runner =
         audio_thread_->task_runner();
     audio_manager_ = media::AudioManager::Create(std::move(audio_task_runner),
                                                  std::move(worker_task_runner),
                                                  MediaInternals::GetInstance());
   }
   CHECK(audio_manager_);
 }
 
 }  // namespace content