Use same condition for field declaration and its use.

cros_supported_configs_ is defined iff OS_CHROMEOS is defined.
However, it is used iff USE_CHROMEOS_MEDIA_ACCELERATION regardless of
OS_CHROMEOS.
This CL aligns the conditions.

BUG=1047719
TEST=Build locally.

Change-Id: I08fe8532c1778ff8c77c7a9d9cdd96ff2a83272f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2030924Reviewed-by: Xiaohan Wang <xhwang@chromium.org>
Reviewed-by: Miguel Casas <mcasas@chromium.org>
Commit-Queue: Miguel Casas <mcasas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#737459}

media/mojo/services/gpu_mojo_media_client.cc

@@ -157,7 +157,7 @@ GpuMojoMediaClient::GetSupportedVideoDecoderConfigs() {
   supported_config_map[VideoDecoderImplementation::kAlternate] =
       *d3d11_supported_configs_;
 
-#elif BUILDFLAG(USE_CHROMEOS_MEDIA_ACCELERATION)
+#elif defined(OS_CHROMEOS) && BUILDFLAG(USE_CHROMEOS_MEDIA_ACCELERATION)
   if (base::FeatureList::IsEnabled(kChromeosVideoDecoder)) {
     if (!cros_supported_configs_) {
       cros_supported_configs_ =

media/mojo/services/gpu_mojo_media_client.h

@@ -74,16 +74,13 @@ class GpuMojoMediaClient : public MojoMediaClient {
 #if defined(OS_CHROMEOS) && BUILDFLAG(USE_CHROMEOS_MEDIA_ACCELERATION)
   // Indirectly owned by GpuChildThread.
   gpu::GpuMemoryBufferFactory* const gpu_memory_buffer_factory_;
+  base::Optional<SupportedVideoDecoderConfigs> cros_supported_configs_;
 #endif  // defined(OS_CHROMEOS) && BUILDFLAG(USE_CHROMEOS_MEDIA_ACCELERATION)
   CdmProxyFactoryCB cdm_proxy_factory_cb_;
 #if defined(OS_WIN)
   base::Optional<SupportedVideoDecoderConfigs> d3d11_supported_configs_;
 #endif  // defined(OS_WIN)
 
-#if defined(OS_CHROMEOS)
-  base::Optional<SupportedVideoDecoderConfigs> cros_supported_configs_;
-#endif  // defined(OS_CHROMEOS)
-
   DISALLOW_COPY_AND_ASSIGN(GpuMojoMediaClient);
 };