Add half-float IOSurface GpuMemoryBuffer support

ui/gl/gl_image_native_pixmap.cc

Index: ui/gl/gl_image_native_pixmap.cc
diff --git a/ui/gl/gl_image_native_pixmap.cc b/ui/gl/gl_image_native_pixmap.cc
index 1e74c2d6a2f29b73fd25652d18b82f8a2f516298..d29de1caacdfdcd470d9fc28df5cb083128d68dc 100644
--- a/ui/gl/gl_image_native_pixmap.cc
+++ b/ui/gl/gl_image_native_pixmap.cc
@@ -67,6 +67,7 @@ bool ValidFormat(gfx::BufferFormat format) {
     case gfx::BufferFormat::DXT5:
     case gfx::BufferFormat::ETC1:
     case gfx::BufferFormat::RGBA_4444:
+    case gfx::BufferFormat::RGBA_F16:
     case gfx::BufferFormat::UYVY_422:
       return false;
   }
@@ -101,6 +102,7 @@ EGLint FourCC(gfx::BufferFormat format) {
     case gfx::BufferFormat::DXT5:
     case gfx::BufferFormat::ETC1:
     case gfx::BufferFormat::RGBA_4444:
+    case gfx::BufferFormat::RGBA_F16:
     case gfx::BufferFormat::UYVY_422:
       NOTREACHED();
       return 0;
@@ -268,6 +270,7 @@ unsigned GLImageNativePixmap::GetInternalFormatForTesting(
     case gfx::BufferFormat::DXT5:
     case gfx::BufferFormat::ETC1:
     case gfx::BufferFormat::RGBA_4444:
+    case gfx::BufferFormat::RGBA_F16:
     case gfx::BufferFormat::UYVY_422:
       NOTREACHED();
       return GL_NONE;