Refactor GL bindings so there is no global GLApi or DriverGL.

ui/gl/gl_image_io_surface.mm

 // Copyright 2013 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_io_surface.h"
 
 #include <map>
 
 #include "base/callback_helpers.h"
 #include "base/mac/bind_objc_block.h"
 #include "base/mac/foundation_util.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/trace_event/memory_allocator_dump.h"
 #include "base/trace_event/memory_dump_manager.h"
 #include "base/trace_event/process_memory_dump.h"
 #include "base/trace_event/trace_event.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_context.h"
-#include "ui/gl/scoped_api.h"
 #include "ui/gl/scoped_binders.h"
 #include "ui/gl/yuv_to_rgb_converter.h"
 
 // Note that this must be included after gl_bindings.h to avoid conflicts.
 #include <OpenGL/CGLIOSurface.h>
 #include <Quartz/Quartz.h>
 #include <stddef.h>
 
 using gfx::BufferFormat;
 
@@ skipping 243 matching lines @@
 
   if (format_ != gfx::BufferFormat::YUV_420_BIPLANAR)
     return false;
 
   GLContext* gl_context = GLContext::GetCurrent();
   DCHECK(gl_context);
 
   YUVToRGBConverter* yuv_to_rgb_converter = gl_context->GetYUVToRGBConverter();
   DCHECK(yuv_to_rgb_converter);
 
-  ScopedSetGLToRealGLApi scoped_set_gl_api;
-
   // Note that state restoration is done explicitly instead of scoped binders to
   // avoid https://crbug.com/601729.
   GLint rgb_texture = 0;
   GLenum target_getter = 0;
   switch (target) {
     case GL_TEXTURE_2D:
       target_getter = GL_TEXTURE_BINDING_2D;
       break;
     case GL_TEXTURE_CUBE_MAP:
       target_getter = GL_TEXTURE_BINDING_CUBE_MAP;
@@ skipping 103 matching lines @@
 }
 
 // static
 GLImageIOSurface* GLImageIOSurface::FromGLImage(GLImage* image) {
   if (!image || image->GetType() != Type::IOSURFACE)
     return nullptr;
   return static_cast<GLImageIOSurface*>(image);
 }
 
 }  // namespace gl