Revert of Add NV12 buffer scanout support from exo to ozone. (patchset #3...

Revert of Add NV12 buffer scanout support from exo to ozone. (patchset #3 id:40001 of https://codereview.chromium.org/2296433002/ )

Reason for revert:
This broke YouTube, Hangout, and camera app on many ChromeOS devices. The video was black. See http://crbug.com/648528.

Original issue's description:
> Add NV12 buffer scanout support from exo to ozone.
>
> Let exo import NV12 scanout buffers and use them to composite.
>
> BUG=646148, b/31159410,b/29625228
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
>
> Committed: https://crrev.com/1e8cdd4dc52fa218459fdc699adc301d36915438
> Cr-Commit-Position: refs/heads/master@{#418096}

TBR=posciak@chromium.org,reveman@chromium.org,sievers@chromium.org,spang@chromium.org,dcastagna@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=646148, b/31159410,b/29625228

Review-Url: https://codereview.chromium.org/2360453003
Cr-Commit-Position: refs/heads/master@{#420031}

components/exo/buffer.cc

@@ -52,7 +52,7 @@ GLenum GLInternalFormat(gfx::BufferFormat format) {
       GL_RGB,                              // BGRX_8888
       GL_BGRA_EXT,                         // BGRA_8888
       GL_RGB_YCRCB_420_CHROMIUM,           // YVU_420
-      GL_RGB_YCBCR_420V_CHROMIUM,          // YUV_420_BIPLANAR
+      GL_INVALID_ENUM,                     // YUV_420_BIPLANAR
       GL_RGB_YCBCR_422_CHROMIUM,           // UYVY_422
   };
   static_assert(arraysize(kGLInternalFormats) ==

components/exo/wayland/server.cc

@@ -473,7 +473,6 @@ const struct drm_supported_format {
     {WL_DRM_FORMAT_ABGR8888, gfx::BufferFormat::RGBA_8888},
     {WL_DRM_FORMAT_XRGB8888, gfx::BufferFormat::BGRX_8888},
     {WL_DRM_FORMAT_ARGB8888, gfx::BufferFormat::BGRA_8888},
-    {WL_DRM_FORMAT_NV12, gfx::BufferFormat::YUV_420_BIPLANAR},
     {WL_DRM_FORMAT_YVU420, gfx::BufferFormat::YVU_420}};
 
 void drm_authenticate(wl_client* client, wl_resource* resource, uint32_t id) {

gpu/command_buffer/service/feature_info.cc

@@ -1072,12 +1072,6 @@ void FeatureInfo::InitializeFeatures() {
     AddExtensionString("GL_CHROMIUM_ycbcr_420v_image");
     feature_flags_.chromium_image_ycbcr_420v = true;
   }
-
-#elif defined(OS_CHROMEOS) && defined(ARCH_CPU_ARM_FAMILY)
-  // TODO(dcastagna): Determine this feature at runtime querying minigbm.
-  // crbug.com/646148
-  AddExtensionString("GL_CHROMIUM_ycbcr_420v_image");
-  feature_flags_.chromium_image_ycbcr_420v = true;
 #endif
 
   if (extensions.Contains("GL_APPLE_ycbcr_422")) {

ui/ozone/gl/gl_image_ozone_native_pixmap.cc

@@ -20,7 +20,6 @@
 #define DRM_FORMAT_XRGB8888 FOURCC('X', 'R', '2', '4')
 #define DRM_FORMAT_XBGR8888 FOURCC('X', 'B', '2', '4')
 #define DRM_FORMAT_YV12 FOURCC('Y', 'V', '1', '2')
-#define DRM_FORMAT_NV12 FOURCC('N', 'V', '1', '2')
 
 namespace ui {
 namespace {
@@ -33,8 +32,6 @@ bool ValidInternalFormat(unsigned internalformat, gfx::BufferFormat format) {
              format == gfx::BufferFormat::BGRX_8888;
     case GL_RGB_YCRCB_420_CHROMIUM:
       return format == gfx::BufferFormat::YVU_420;
-    case GL_RGB_YCBCR_420V_CHROMIUM:
-      return format == gfx::BufferFormat::YUV_420_BIPLANAR;
     case GL_RGBA:
       return format == gfx::BufferFormat::RGBA_8888;
     case GL_BGRA_EXT:
@@ -55,7 +52,6 @@ bool ValidFormat(gfx::BufferFormat format) {
     case gfx::BufferFormat::BGRA_8888:
     case gfx::BufferFormat::BGRX_8888:
     case gfx::BufferFormat::YVU_420:
-    case gfx::BufferFormat::YUV_420_BIPLANAR:
       return true;
     case gfx::BufferFormat::ATC:
     case gfx::BufferFormat::ATCIA:
@@ -63,6 +59,7 @@ bool ValidFormat(gfx::BufferFormat format) {
     case gfx::BufferFormat::DXT5:
     case gfx::BufferFormat::ETC1:
     case gfx::BufferFormat::RGBA_4444:
+    case gfx::BufferFormat::YUV_420_BIPLANAR:
     case gfx::BufferFormat::UYVY_422:
       return false;
   }
@@ -87,14 +84,13 @@ EGLint FourCC(gfx::BufferFormat format) {
       return DRM_FORMAT_XRGB8888;
     case gfx::BufferFormat::YVU_420:
       return DRM_FORMAT_YV12;
-    case gfx::BufferFormat::YUV_420_BIPLANAR:
-      return DRM_FORMAT_NV12;
     case gfx::BufferFormat::ATC:
     case gfx::BufferFormat::ATCIA:
     case gfx::BufferFormat::DXT1:
     case gfx::BufferFormat::DXT5:
     case gfx::BufferFormat::ETC1:
     case gfx::BufferFormat::RGBA_4444:
+    case gfx::BufferFormat::YUV_420_BIPLANAR:
     case gfx::BufferFormat::UYVY_422:
       NOTREACHED();
       return 0;