Enable VAAPI accelerated decode on Linux

content/browser/renderer_host/media/video_capture_gpu_jpeg_decoder.cc

Index: content/browser/renderer_host/media/video_capture_gpu_jpeg_decoder.cc
diff --git a/content/browser/renderer_host/media/video_capture_gpu_jpeg_decoder.cc b/content/browser/renderer_host/media/video_capture_gpu_jpeg_decoder.cc
index 043587f39eff73f40bc3b38f6c8980ea7ff8f7fa..2e78e13ddfd72767c19820ee9a504db93e428345 100644
--- a/content/browser/renderer_host/media/video_capture_gpu_jpeg_decoder.cc
+++ b/content/browser/renderer_host/media/video_capture_gpu_jpeg_decoder.cc
@@ -47,8 +47,8 @@ void VideoCaptureGpuJpegDecoder::Initialize() {
 
   base::AutoLock lock(lock_);
   bool is_platform_supported = false;
-#if defined(OS_CHROMEOS)
-  // Non-ChromeOS platforms do not support HW JPEG decode now. Do not establish
+#if defined(OS_CHROMEOS) || defined(OS_LINUX)
+  // Non-Linux platforms do not support HW JPEG decode now. Do not establish
   // gpu channel to avoid introducing overhead.
   is_platform_supported = true;
 #endif