gpu: Use ANDROID_native_fence_sync instead of ARM_implicit_external_sync.

components/exo/wayland/clients/client_base.cc

 // Copyright 2017 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 "components/exo/wayland/clients/client_base.h"
 
 #include <fcntl.h>
 #include <linux-dmabuf-unstable-v1-client-protocol.h>
 #include <presentation-time-client-protocol.h>
 #include <wayland-client-core.h>
@@ skipping 270 matching lines @@
     bool gl_initialized = gl::init::InitializeGLOneOff();
     DCHECK(gl_initialized);
     gl_surface_ = gl::init::CreateOffscreenGLSurface(gfx::Size());
     gl_context_ =
         gl::init::CreateGLContext(nullptr,  // share_group
                                   gl_surface_.get(), gl::GLContextAttribs());
 
     make_current_.reset(
         new ui::ScopedMakeCurrent(gl_context_.get(), gl_surface_.get()));
 
-    if (gl::GLSurfaceEGL::HasEGLExtension("EGL_EXT_image_flush_external") ||
-        gl::GLSurfaceEGL::HasEGLExtension("EGL_ARM_implicit_external_sync")) {
-      egl_sync_type_ = EGL_SYNC_FENCE_KHR;
-    }
     if (gl::GLSurfaceEGL::HasEGLExtension("EGL_ANDROID_native_fence_sync")) {
       egl_sync_type_ = EGL_SYNC_NATIVE_FENCE_ANDROID;
+    } else {
+      egl_sync_type_ = EGL_SYNC_FENCE_KHR;

[Daniele Castagna, 2017/05/22 20:04:08]

Should we DCHECK this is available?

[reveman, 2017/05/22 20:27:19]

Added a EGL_KHR_fence_sync DCHECK here. We should consider doing the same for
gbm_surfaceless in a separate patch if possible.

     }
 
     native_interface = sk_sp<const GrGLInterface>(GrGLCreateNativeInterface());
     DCHECK(native_interface);
     gr_context_ = sk_sp<GrContext>(GrContext::Create(
         kOpenGL_GrBackend,
         reinterpret_cast<GrBackendContext>(native_interface.get())));
     DCHECK(gr_context_);
   }
 #endif
@@ skipping 157 matching lines @@
   buffer->sk_surface = SkSurface::MakeRasterDirect(
       SkImageInfo::Make(width_, height_, kColorType, kOpaque_SkAlphaType),
       static_cast<uint8_t*>(buffer->shared_memory->memory()), stride);
   DCHECK(buffer->sk_surface);
   return buffer;
 }
 
 }  // namespace clients
 }  // namespace wayland
 }  // namespace exo