Refactor GL bindings so there is no global GLApi or DriverGL.

gpu/command_buffer/service/gles2_cmd_decoder_passthrough.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder_passthrough.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_passthrough.cc b/gpu/command_buffer/service/gles2_cmd_decoder_passthrough.cc
index eea4e8cb1c7f91d04d225de5b66a120edf2738b7..ee25a045d89c983c3e2654c070ab45b51f25e3c6 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_passthrough.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_passthrough.cc
@@ -223,10 +223,19 @@ void GLES2DecoderPassthroughImpl::Destroy(bool have_context) {
       &vertex_array_id_map_, have_context,
       [](GLuint vertex_array) { glDeleteVertexArraysOES(1, &vertex_array); });
 
+  // Destroy the surface before the context, some surface destructors make GL
+  // calls.
+  surface_ = nullptr;
+
   if (group_) {
     group_->Destroy(this, have_context);
     group_ = nullptr;
   }
+
+  if (context_.get()) {
+    context_->ReleaseCurrent(nullptr);
+    context_ = nullptr;
+  }
 }
 
 void GLES2DecoderPassthroughImpl::SetSurface(