Make it possible to use OSMesa on Android

ui/gl/gl_implementation_linux.cc

-// 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_implementation_linux.h"
-
-#include "base/files/file_path.h"
-#include "base/logging.h"
-#include "base/native_library.h"
-#include "base/path_service.h"
-#include "ui/gl/gl_bindings.h"
-#include "ui/gl/gl_gl_api_implementation.h"
-#include "ui/gl/gl_implementation.h"
-#include "ui/gl/gl_osmesa_api_implementation.h"
-
-namespace gfx {
-
-// Load a library, printing an error message on failure.
-base::NativeLibrary LoadLibrary(const base::FilePath& filename) {
-  std::string error;
-  base::NativeLibrary library = base::LoadNativeLibrary(filename, &error);
-  if (!library) {
-    DVLOG(1) << "Failed to load " << filename.MaybeAsASCII() << ": " << error;
-    return NULL;
-  }
-  return library;
-}
-
-base::NativeLibrary LoadLibrary(const char* filename) {
-  return LoadLibrary(base::FilePath(filename));
-}
-
-bool InitializeStaticGLBindingsOSMesaGL() {
-  base::FilePath module_path;
-  if (!PathService::Get(base::DIR_MODULE, &module_path)) {
-    LOG(ERROR) << "PathService::Get failed.";
-    return false;
-  }
-
-  base::NativeLibrary library = LoadLibrary(module_path.Append("libosmesa.so"));
-  if (!library)
-    return false;
-
-  GLGetProcAddressProc get_proc_address =
-      reinterpret_cast<GLGetProcAddressProc>(
-          base::GetFunctionPointerFromNativeLibrary(library,
-                                                    "OSMesaGetProcAddress"));
-  if (!get_proc_address) {
-    LOG(ERROR) << "OSMesaGetProcAddress not found.";
-    base::UnloadNativeLibrary(library);
-    return false;
-  }
-
-  SetGLGetProcAddressProc(get_proc_address);
-  AddGLNativeLibrary(library);
-  SetGLImplementation(kGLImplementationOSMesaGL);
-
-  InitializeStaticGLBindingsGL();
-  InitializeStaticGLBindingsOSMESA();
-  return true;
-}
-
-}  // namespace gfx