On Linux rework driver_version/vendor extraction from gl version

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 738 matching lines @@
   // 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);
+
+  // Prevent this flag to be turned off later since it is only used here.
+  if (!enable_transparent_visuals &&
+      !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));
   base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
       switches::kX11VisualID, base::UintToString(visual->visualid));
 #endif
 
@@ skipping 757 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