Enable VAAPI accelerated decode on Linux

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 160d0c31c5cbe2f1517d33d4a916c8a506ad1859..e91ba28b2eb9a33a5d019552930c8f39610dd7d4 100644
--- a/content/common/gpu/media/gpu_video_decode_accelerator.cc
+++ b/content/common/gpu/media/gpu_video_decode_accelerator.cc
@@ -57,7 +57,7 @@ static bool MakeDecoderContextCurrent(
   return true;
 }
 
-#if (defined(OS_CHROMEOS) && defined(ARCH_CPU_X86_FAMILY)) || defined(OS_MACOSX)
+#if ((defined(OS_CHROMEOS) || defined(OS_LINUX)) && defined(ARCH_CPU_X86_FAMILY)) || defined(OS_MACOSX)
 static bool BindImage(const base::WeakPtr<gpu::GpuCommandBufferStub>& stub,
                       uint32_t client_texture_id,
                       uint32_t texture_target,
@@ -169,7 +169,7 @@ GpuVideoDecodeAccelerator::GpuVideoDecodeAccelerator(
   get_gl_context_cb_ = base::Bind(&GetGLContext, stub_->AsWeakPtr());
   make_context_current_cb_ =
       base::Bind(&MakeDecoderContextCurrent, stub_->AsWeakPtr());
-#if (defined(OS_CHROMEOS) && defined(ARCH_CPU_X86_FAMILY)) || defined(OS_MACOSX)
+#if ((defined(OS_CHROMEOS) || defined(OS_LINUX)) && defined(ARCH_CPU_X86_FAMILY)) || defined(OS_MACOSX)
   bind_image_cb_ = base::Bind(&BindImage, stub_->AsWeakPtr());
 #endif
   get_gles2_decoder_cb_ = base::Bind(&GetGLES2Decoder, stub_->AsWeakPtr());