gpu: Recompute driver bug workarounds on linux

content/gpu/gpu_main.cc

Index: content/gpu/gpu_main.cc
diff --git a/content/gpu/gpu_main.cc b/content/gpu/gpu_main.cc
index 93d03aa43db85886b5dbc9ab48d12206c44e532d..4c2e1a5c48b70c733b09f3468ef9eab1d8f8f5f5 100644
--- a/content/gpu/gpu_main.cc
+++ b/content/gpu/gpu_main.cc
@@ -292,7 +292,7 @@ int GpuMain(const MainFunctionParams& parameters) {
       if (!CollectGraphicsInfo(gpu_info))
         dead_on_arrival = true;
 
-#if defined(OS_CHROMEOS) || defined(OS_ANDROID)
+#if defined(OS_CHROMEOS) || defined(OS_ANDROID) || defined(OS_LINUX)
       // Recompute gpu driver bug workarounds - this is specifically useful
       // on systems where vendor_id/device_id aren't available.

[Ken Russell (switch to Gerrit), 2015/10/22 17:30:32]

Could you please expand this comment? "This is necessary on systems where
vendor_id/device_id aren't available (Chrome OS, Android) or where workarounds
may be dependent on GL_VENDOR and GL_RENDERER strings which are lazily computed
(Linux)."

       if (!command_line.HasSwitch(switches::kDisableGpuDriverBugWorkarounds)) {