gpu: Add GpuFence framework.

gpu/gles2_conform_support/egl/context.cc

 // Copyright (c) 2016 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 "gpu/gles2_conform_support/egl/context.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "gpu/command_buffer/client/gles2_implementation.h"
@@ skipping 212 matching lines @@
 
 void Context::SignalSyncToken(const gpu::SyncToken& sync_token,
                               const base::Closure& callback) {
   NOTIMPLEMENTED();
 }
 
 bool Context::CanWaitUnverifiedSyncToken(const gpu::SyncToken* sync_token) {
   return false;
 }
 
+int32_t Context::CreateFence(ClientFence fence) {
+  NOTIMPLEMENTED();
+  return -1;
+}
+
+void Context::DestroyFence(int32_t id) {
+  NOTIMPLEMENTED();
+}
+
 void Context::ApplyCurrentContext(gl::GLSurface* current_surface) {
   DCHECK(HasService());
   // The current_surface will be the same as
   // the surface of the decoder. We can not DCHECK as there is
   // no accessor.
   if (!WasServiceContextLost()) {
     if (!gl_context_->MakeCurrent(current_surface))
       MarkServiceContextLost();
   }
   gles2::SetGLContext(client_gl_context_.get());
@@ skipping 147 matching lines @@
     return false;
   if (!gl_context_->MakeCurrent(gl_surface)) {
     MarkServiceContextLost();
     return false;
   }
   client_gl_context_->Flush();
   return true;
 }
 
 }  // namespace egl