Revert "Replaced blink sync points with new sync tokens."

gpu/blink/webgraphicscontext3d_impl.h

Index: gpu/blink/webgraphicscontext3d_impl.h
diff --git a/gpu/blink/webgraphicscontext3d_impl.h b/gpu/blink/webgraphicscontext3d_impl.h
index 81a2667e992912c89f98b412c1cfea276a4f3de7..6a644c973caba3f32d9d411c89c0f919bc952a24 100644
--- a/gpu/blink/webgraphicscontext3d_impl.h
+++ b/gpu/blink/webgraphicscontext3d_impl.h
@@ -37,10 +37,8 @@ class GPU_BLINK_EXPORT WebGraphicsContext3DImpl
 
   uint32_t lastFlushID() override;
 
-  blink::WGC3Duint64 insertFenceSyncCHROMIUM() override;
-  bool genSyncTokenCHROMIUM(blink::WGC3Duint64 fenceSync,
-                            blink::WGC3Dbyte* syncToken) override;
-  void waitSyncTokenCHROMIUM(const blink::WGC3Dbyte* syncToken) override;
+  bool insertSyncPoint(blink::WGC3Dbyte* sync_token) override;
+  void waitSyncToken(const blink::WGC3Dbyte* sync_token) override;
 
   void loseContextCHROMIUM(blink::WGC3Denum current,
                            blink::WGC3Denum other) override;