gpu: Add async pixel transfer interface, stub and tests.

ui/gl/gl_bindings.h

 // 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.
 
 #ifndef UI_GL_GL_BINDINGS_H_
 #define UI_GL_GL_BINDINGS_H_
 
 // Includes the platform independent and platform dependent GL headers.
 // Only include this in cc files. It pulls in system headers, including
 // the X11 headers on linux, which define all kinds of macros that are
@@ skipping 35 matching lines @@
   #define GL_SERVICE_LOG_CODE_BLOCK(code) code
 #endif
 
 // Forward declare OSMesa types.
 typedef struct osmesa_context *OSMesaContext;
 typedef void (*OSMESAproc)();
 
 #if !defined(OS_MACOSX)
 
 // Forward declare EGL types.
+typedef uint64 EGLTimeKHR;
 typedef unsigned int EGLBoolean;
 typedef unsigned int EGLenum;
 typedef int EGLint;
 typedef void *EGLConfig;
 typedef void *EGLContext;
 typedef void *EGLDisplay;
 typedef void *EGLImageKHR;
 typedef void *EGLSurface;
 typedef void *EGLClientBuffer;
+typedef void *EGLSyncKHR;
 typedef void (*__eglMustCastToProperFunctionPointerType)(void);
 typedef void* GLeglImageOES;
 
 #if defined(OS_WIN)
 typedef HDC     EGLNativeDisplayType;
 typedef HBITMAP EGLNativePixmapType;
 typedef HWND    EGLNativeWindowType;
 #elif defined(OS_ANDROID)
 typedef void                       *EGLNativeDisplayType;
 typedef struct egl_native_pixmap_t *EGLNativePixmapType;
@@ skipping 46 matching lines @@
 GL_EXPORT extern DriverEGL g_driver_egl;
 
 #endif
 
 // Find an entry point to the mock GL implementation.
 void* GL_BINDING_CALL GetMockGLProcAddress(const char* name);
 
 }  // namespace gfx
 
 #endif  // UI_GL_GL_BINDINGS_H_