Make V4L2VEA GetSupportedProfiles static.

VEA supported profiles are added to GPUInfo when GPU
process starts. But the video devices are not ready
yet at that time. We need a low risk way to fix this
in M39. Make V4L2VEA GetSupportedProfiles static so we
can merge it back to M39. This will be fixed later in
a proper way.

BUG=418762
TEST=Reboot on peach pit and run apprtc loopback.

Review URL: https://codereview.chromium.org/650183002

Cr-Commit-Position: refs/heads/master@{#299453}

content/common/gpu/media/gpu_video_encode_accelerator.cc

@@ -165,6 +165,12 @@ void GpuVideoEncodeAccelerator::OnWillDestroyStub() {
 // static
 std::vector<media::VideoEncodeAccelerator::SupportedProfile>
 GpuVideoEncodeAccelerator::GetSupportedProfiles() {
+#if defined(OS_CHROMEOS) && defined(USE_X11) && defined(ARCH_CPU_ARMEL)
+  // This is a work-around for M39 because the video device is not ready at
+  // boot.
+  // TODO(wuchengli): remove this after http://crbug.com/418762 is fixed.
+  return V4L2VideoEncodeAccelerator::GetSupportedProfilesStatic();
+#endif
   scoped_ptr<media::VideoEncodeAccelerator> encoder = CreateEncoder();
   if (!encoder)
     return std::vector<media::VideoEncodeAccelerator::SupportedProfile>();

content/common/gpu/media/v4l2_video_encode_accelerator.cc

@@ -282,6 +282,11 @@ void V4L2VideoEncodeAccelerator::Destroy() {
 
 std::vector<media::VideoEncodeAccelerator::SupportedProfile>
 V4L2VideoEncodeAccelerator::GetSupportedProfiles() {
+  return GetSupportedProfilesStatic();
+}
+
+std::vector<media::VideoEncodeAccelerator::SupportedProfile>
+V4L2VideoEncodeAccelerator::GetSupportedProfilesStatic() {
   std::vector<SupportedProfile> profiles;
   SupportedProfile profile;
 

content/common/gpu/media/v4l2_video_encode_accelerator.h

@@ -45,6 +45,9 @@ class CONTENT_EXPORT V4L2VideoEncodeAccelerator
   explicit V4L2VideoEncodeAccelerator(scoped_ptr<V4L2Device> device);
   virtual ~V4L2VideoEncodeAccelerator();
 
+  static std::vector<media::VideoEncodeAccelerator::SupportedProfile>
+      GetSupportedProfilesStatic();
+
   // media::VideoEncodeAccelerator implementation.
   virtual std::vector<media::VideoEncodeAccelerator::SupportedProfile>
       GetSupportedProfiles() override;