Revert of gpu: Use ANDROID_native_fence_sync instead of ARM_implicit_external_sync.

cc/output/direct_renderer.cc

Index: cc/output/direct_renderer.cc
diff --git a/cc/output/direct_renderer.cc b/cc/output/direct_renderer.cc
index 18259fe7ebc08ef72c226efd789b3108957d6775..5339f829c2b2b0af105efb910e636f5b47907b0c 100644
--- a/cc/output/direct_renderer.cc
+++ b/cc/output/direct_renderer.cc
@@ -97,6 +97,10 @@
       allow_empty_swap_ = true;
     if (context_provider->ContextCapabilities().dc_layers)
       supports_dc_layers_ = true;
+    if (context_provider->ContextCapabilities()
+            .disable_non_empty_post_sub_buffers) {
+      use_partial_swap_ = false;
+    }
   }
 
   initialized_ = true;