Move code around to fix build with system mesa.

third_party/khronos/README.chromium

Index: third_party/khronos/README.chromium
diff --git a/third_party/khronos/README.chromium b/third_party/khronos/README.chromium
index 285f1d6bb9f835d0e06333a32430ba72bf471fe9..b47cb038c3cc5b51181194a55869842118bf7a56 100644
--- a/third_party/khronos/README.chromium
+++ b/third_party/khronos/README.chromium
@@ -16,31 +16,16 @@ for GLES2/*.
 
 Local Modifications:
 
+NOTE: Please add Chromium-specific declarations to files in gpu/{GL,EGL,GLES2}
+and not here.
+
 GLES2/gl2.h
  - Added GL_CONTEXT_LOST constant.
  - Added include of gl2chromium.h
 GLES2/gl2ext.h
  - Added Chromium and Angle extensions.
- - Added GL_ANGLE_instanced_arrays
- - Added GL_ARB_robustness (subsetted)
- - Added GL_ARB_texture_rectangle (subsetted)
- - Added GL_CHROMIUM_async_pixel_transfers
- - Added GL_CHROMIUM_bind_uniform_location
- - Added GL_CHROMIUM_command_buffer_latency_query
- - Added GL_CHROMIUM_command_buffer_query
- - Added GL_CHROMIUM_copy_texture
- - Added GL_CHROMIUM_get_error_query
- - Added GL_CHROMIUM_gpu_memory_manager
- - Added GL_CHROMIUM_iosurface
- - Added GL_CHROMIUM_lose_context
- - Added GL_CHROMIUM_pixel_transfer_buffer_object
- - Added GL_CHROMIUM_texture_from_image
- - Added GL_EXT_framebuffer_multisample
- - Added GL_NVX_gpu_memory_info
  - Added include of gl2chromium.h
 EGL/eglplatform.h
  - Added EGLNative*Type for Mac.
 DEPS
  - Added DEPS file to prevent inclusion of external dependencies.
-EGL/eglext.h
- - Added EGL_CHROMIUM_sync_control