Revert of gpu: Expose internal format R8 instead of RED.

gpu/command_buffer/tests/gl_gpu_memory_buffer_unittest.cc

Index: gpu/command_buffer/tests/gl_gpu_memory_buffer_unittest.cc
diff --git a/gpu/command_buffer/tests/gl_gpu_memory_buffer_unittest.cc b/gpu/command_buffer/tests/gl_gpu_memory_buffer_unittest.cc
index a434df1797acfeb403ed4912a55e2eece1f4f4aa..5f1e1e0a1194bf01bd69fd038a67e440eac1a43b 100644
--- a/gpu/command_buffer/tests/gl_gpu_memory_buffer_unittest.cc
+++ b/gpu/command_buffer/tests/gl_gpu_memory_buffer_unittest.cc
@@ -128,7 +128,7 @@
 GLenum InternalFormat(gfx::BufferFormat format) {
   switch (format) {
     case gfx::BufferFormat::R_8:
-      return GL_R8;
+      return GL_RED;
     case gfx::BufferFormat::RGBA_4444:
     case gfx::BufferFormat::RGBA_8888:
       return GL_RGBA;