Implemented new fence syncs which replaces the old sync points.

gpu/gles2_conform_support/egl/display.cc

Index: gpu/gles2_conform_support/egl/display.cc
diff --git a/gpu/gles2_conform_support/egl/display.cc b/gpu/gles2_conform_support/egl/display.cc
index 546184d1a7f3a18fbe98c8a8a7d8f5a070edf9f4..3168fa9b5f7273c3d8a6b03859e25f942c851cca 100644
--- a/gpu/gles2_conform_support/egl/display.cc
+++ b/gpu/gles2_conform_support/egl/display.cc
@@ -35,7 +35,8 @@ Display::Display(EGLNativeDisplayType display_id)
 #endif
       create_offscreen_(false),
       create_offscreen_width_(0),
-      create_offscreen_height_(0) {
+      create_offscreen_height_(0),
+      next_fence_sync_release_(1) {
 }
 
 Display::~Display() {
@@ -352,4 +353,16 @@ uint64_t Display::GetCommandBufferID() const {
   return 0;
 }
 
+uint64_t Display::GenerateFenceSyncRelease() {
+  return next_fence_sync_release_++;
+}
+
+bool Display::IsFenceSyncRelease(uint64_t release) {
+  return release > 0 && release < next_fence_sync_release_;
+}
+
+bool Display::IsFenceSyncFlushed(uint64_t release) {
+  return IsFenceSyncRelease(release);
+}
+
 }  // namespace egl