ui/gl: On a core profile use sized types for R32F and RG32F

ui/gl/gl_gl_api_implementation.cc

 // Copyright (c) 2012 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_gl_api_implementation.h"
 
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/stl_util.h"
@@ skipping 123 matching lines @@
         break;
       case GL_LUMINANCE_ALPHA:
         gl_internal_format = GL_LUMINANCE_ALPHA32F_ARB;
         break;
       case GL_LUMINANCE:
         gl_internal_format = GL_LUMINANCE32F_ARB;
         break;
       case GL_ALPHA:
         gl_internal_format = GL_ALPHA32F_ARB;
         break;
+      // RED and RG are reached here because on Desktop GL core profile,
+      // LUMINANCE/ALPHA formats are emulated through RED and RG in Chrome.
+      case GL_RED:
+        gl_internal_format = GL_R32F;
+        break;
+      case GL_RG:
+        gl_internal_format = GL_RG32F;
+        break;
       default:
         // We can't assert here because if the client context is ES3,
         // all sized internal_format will reach here.
         break;
     }
   } else if (type == GL_HALF_FLOAT_OES) {
     switch (internal_format) {
       case GL_RGBA:
         gl_internal_format = GL_RGBA16F_ARB;
         break;
@@ skipping 520 matching lines @@
 
 void VirtualGLApi::glFlushFn() {
   GLApiBase::glFlushFn();
 }
 
 void VirtualGLApi::glFinishFn() {
   GLApiBase::glFinishFn();
 }
 
 }  // namespace gl