ui: Add ref-counting to GLFence class.

ui/gl/gl_fence.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_fence.h"
 
 #include "base/compiler_specific.h"
 #include "build/build_config.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_context.h"
@@ skipping 21 matching lines @@
   return g_driver_gl.ext.b_GL_ARB_sync || GetGLVersionInfo()->is_es3 ||
          GetGLVersionInfo()->is_desktop_core_profile ||
 #if defined(OS_MACOSX)
          g_driver_gl.ext.b_GL_APPLE_fence ||
 #else
          g_driver_egl.ext.b_EGL_KHR_fence_sync ||
 #endif
          g_driver_gl.ext.b_GL_NV_fence;
 }
 
-GLFence* GLFence::Create() {
+scoped_refptr<GLFence> GLFence::Create() {
   DCHECK(GLContext::GetCurrent())
       << "Trying to create fence with no context";
 
-  std::unique_ptr<GLFence> fence;
+  scoped_refptr<GLFence> fence;
 #if !defined(OS_MACOSX)
   if (g_driver_egl.ext.b_EGL_KHR_fence_sync &&
       g_driver_egl.ext.b_EGL_KHR_wait_sync) {
     // Prefer GLFenceEGL which doesn't require GL context switching.
-    fence.reset(new GLFenceEGL);
+    fence = make_scoped_refptr(new GLFenceEGL);
   } else
 #endif
       if (g_driver_gl.ext.b_GL_ARB_sync || GetGLVersionInfo()->is_es3 ||
           GetGLVersionInfo()->is_desktop_core_profile) {
     // Prefer ARB_sync which supports server-side wait.
-    fence.reset(new GLFenceARB);
+    fence = make_scoped_refptr(new GLFenceARB);
 #if defined(OS_MACOSX)
   } else if (g_driver_gl.ext.b_GL_APPLE_fence) {
-    fence.reset(new GLFenceAPPLE);
+    fence = make_scoped_refptr(new GLFenceAPPLE);
 #else
   } else if (g_driver_egl.ext.b_EGL_KHR_fence_sync) {
-    fence.reset(new GLFenceEGL);
+    fence = make_scoped_refptr(new GLFenceEGL);
 #endif
   } else if (g_driver_gl.ext.b_GL_NV_fence) {
-    fence.reset(new GLFenceNV);
+    fence = make_scoped_refptr(new GLFenceNV);
   }
 
   DCHECK_EQ(!!fence.get(), GLFence::IsSupported());
-  return fence.release();
+  return fence;
 }
 
 bool GLFence::ResetSupported() {
   // Resetting a fence to its original state isn't supported by default.
   return false;
 }
 
 void GLFence::ResetState() {
   NOTIMPLEMENTED();
 }
 
 void GLFence::Invalidate() {
   NOTIMPLEMENTED();
 }
 
 bool GLFence::SignalSupported() {
   // Signaling a fence isn't supported by default.
   return false;
 }
 
 void GLFence::Signal() {
   NOTIMPLEMENTED();
 }
 
 }  // namespace gl