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

ui/gl/gl_image_memory.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gl/gl_image_memory.h"
 
 #include <stdint.h>
 
 #include "base/logging.h"
 #include "base/numerics/safe_conversions.h"
 #include "base/trace_event/trace_event.h"
 #include "ui/gfx/buffer_format_util.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_context.h"
 #include "ui/gl/gl_version_info.h"
 
 using gfx::BufferFormat;
 
 namespace gl {
 namespace {
 
 bool ValidInternalFormat(unsigned internalformat) {
   switch (internalformat) {
     case GL_ATC_RGB_AMD:
     case GL_ATC_RGBA_INTERPOLATED_ALPHA_AMD:
     case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
     case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
     case GL_ETC1_RGB8_OES:
-    case GL_R8:
+    case GL_RED:
     case GL_RGB:
     case GL_RGBA:
     case GL_BGRA_EXT:
       return true;
     default:
       return false;
   }
 }
 
 bool ValidFormat(BufferFormat format) {
@@ skipping 52 matching lines @@
       return GL_ATC_RGB_AMD;
     case BufferFormat::ATCIA:
       return GL_ATC_RGBA_INTERPOLATED_ALPHA_AMD;
     case BufferFormat::DXT1:
       return GL_COMPRESSED_RGB_S3TC_DXT1_EXT;
     case BufferFormat::DXT5:
       return GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
     case BufferFormat::ETC1:
       return GL_ETC1_RGB8_OES;
     case BufferFormat::R_8:
-      return gfx::GLContext::GetCurrent()->GetVersionInfo()->IsES3Capable()
-                 ? GL_R8
-                 : GL_RED;
+      return GL_RED;
     case BufferFormat::RGBA_4444:
     case BufferFormat::RGBA_8888:
       return GL_RGBA;
     case BufferFormat::BGRA_8888:
       return GL_BGRA_EXT;
     case BufferFormat::RGBX_8888:
     case BufferFormat::BGRX_8888:
       return GL_RGB;
     case BufferFormat::YUV_420:
     case BufferFormat::YUV_420_BIPLANAR:
     case BufferFormat::UYVY_422:
       NOTREACHED();
       return 0;
   }
 
   NOTREACHED();
   return 0;
 }
 
 GLenum DataFormat(BufferFormat format) {
   switch (format) {
     case BufferFormat::RGBX_8888:
       return GL_RGBA;
     case BufferFormat::BGRX_8888:
       return GL_BGRA_EXT;
-    case BufferFormat::R_8:
-      return GL_RED;
     case BufferFormat::RGBA_4444:
     case BufferFormat::RGBA_8888:
     case BufferFormat::BGRA_8888:
+    case BufferFormat::R_8:
     case BufferFormat::ATC:
     case BufferFormat::ATCIA:
     case BufferFormat::DXT1:
     case BufferFormat::DXT5:
     case BufferFormat::ETC1:
       return TextureFormat(format);
     case BufferFormat::YUV_420:
     case BufferFormat::YUV_420_BIPLANAR:
     case BufferFormat::UYVY_422:
       NOTREACHED();
@@ skipping 302 matching lines @@
   return false;
 }
 
 // static
 unsigned GLImageMemory::GetInternalFormatForTesting(BufferFormat format) {
   DCHECK(ValidFormat(format));
   return TextureFormat(format);
 }
 
 }  // namespace gl