Add a factory and defines for native Linux surfaces.

ui/gl/gl_context_egl.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_context_egl.h"
 
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "build/build_config.h"
@@ skipping 21 matching lines @@
       unbind_fbo_on_makecurrent_(false) {
 }
 
 bool GLContextEGL::Initialize(
     GLSurface* compatible_surface, GpuPreference gpu_preference) {
   DCHECK(compatible_surface);
   DCHECK(!context_);
 
   static const EGLint kContextAttributes[] = {
     EGL_CONTEXT_CLIENT_VERSION, 2,
+#if defined(USE_NATIVE_SURFACE_LINUX)
+    EGL_CONTEXT_PRIORITY_LEVEL_IMG, EGL_CONTEXT_PRIORITY_HIGH_IMG,
+#endif
     EGL_NONE
   };
   static const EGLint kContextRobustnessAttributes[] = {
     EGL_CONTEXT_CLIENT_VERSION, 2,
     EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_EXT,
     EGL_LOSE_CONTEXT_ON_RESET_EXT,
     EGL_NONE
   };
 
   display_ = compatible_surface->GetDisplay();
@@ skipping 140 matching lines @@
 
 #if !defined(OS_ANDROID)
 bool GLContextEGL::GetTotalGpuMemory(size_t* bytes) {
   DCHECK(bytes);
   *bytes = 0;
   return false;
 }
 #endif
 
 }  // namespace gfx