Remove linux x86 from HW video decode black list

content/common/gpu/media/gpu_video_decode_accelerator.cc

Index: content/common/gpu/media/gpu_video_decode_accelerator.cc
diff --git a/content/common/gpu/media/gpu_video_decode_accelerator.cc b/content/common/gpu/media/gpu_video_decode_accelerator.cc
index 1d9afd4526417a94da737656ee7b3d8cf3ce2a50..863e6a711848ec8bb3efc712e7021f2b1cb838ea 100644
--- a/content/common/gpu/media/gpu_video_decode_accelerator.cc
+++ b/content/common/gpu/media/gpu_video_decode_accelerator.cc
@@ -26,7 +26,7 @@
 #elif defined(OS_CHROMEOS) && defined(ARCH_CPU_ARMEL) && defined(USE_X11)
 #include "content/common/gpu/media/exynos_video_decode_accelerator.h"
 #include "content/common/gpu/media/omx_video_decode_accelerator.h"
-#elif defined(OS_CHROMEOS) && defined(ARCH_CPU_X86_FAMILY) && defined(USE_X11)
+#elif defined(ARCH_CPU_X86_FAMILY) && defined(USE_X11)
 #include "ui/gl/gl_context_glx.h"
 #include "content/common/gpu/media/vaapi_video_decode_accelerator.h"
 #elif defined(OS_ANDROID)
@@ -191,7 +191,7 @@ void GpuVideoDecodeAccelerator::Initialize(
         this,
         make_context_current_));
   }
-#elif defined(OS_CHROMEOS) && defined(ARCH_CPU_X86_FAMILY) && defined(USE_X11)
+#elif defined(ARCH_CPU_X86_FAMILY) && defined(USE_X11)
   gfx::GLContextGLX* glx_context =
       static_cast<gfx::GLContextGLX*>(stub_->decoder()->GetGLContext());
   GLXContext glx_context_handle =