Update GL_CHROMIUM_image with support for compressed formats.

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 "base/logging.h"
 #include "base/trace_event/trace_event.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/scoped_binders.h"
 
 #if defined(OS_WIN) || defined(USE_X11) || defined(OS_ANDROID) || \
     defined(USE_OZONE)
 #include "ui/gl/gl_surface_egl.h"
 #endif
 
 namespace gfx {
 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:

[piman, 2015/05/13 16:41:57]

Just to check: the enum is validated upstream against the extensions, right?

[christiank, 2015/05/18 11:10:52]

Yes, it's validated against extensions in GpuCommandBufferStub::OnCreateImage,
by calling gpu::ImageFactory::IsGpuMemoryBufferFormatSupported.

     case GL_R8:
     case GL_RGBA:
     case GL_BGRA_EXT:
       return true;
     default:
       return false;
   }
 }
 
 bool ValidFormat(GpuMemoryBuffer::Format format) {
@@ skipping 370 matching lines @@
                  size_.width(),
                  size_.height(),
                  0,  // border
                  DataFormat(format_),
                  DataType(format_),
                  memory_);
   }
 }
 
 }  // namespace gfx