cc/blimp: Proto Cleanup.

cc/proto/synced_property.proto

-// Copyright 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.
-
-syntax = "proto2";
-
-import "scroll_offset.proto";
-
-option optimize_for = LITE_RUNTIME;
-
-package cc.proto;
-
-// Since plumbing SyncedScrollOffset is only used by PropertyTree, and can only
-// travel from main thread to impl thread one way, the From/To protobuf function
-// for SyncedProperty only needs to care the current base, because main thread
-// does not have pending/active tree or scroll offset deltas.
-message ScrollOffsetGroup {
-  optional ScrollOffset pending_base = 1;
-  optional ScrollOffset pending_delta = 2;
-  optional ScrollOffset active_base = 3;
-  optional ScrollOffset active_delta = 4;
-  optional ScrollOffset sent_delta = 5;
-}
-
-message SyncedProperty {
-  optional bool clobber_active_value = 1;
-
-  optional ScrollOffsetGroup scroll_offset_group = 1001;
-}