cc: Remove all blimp code from cc.

cc/proto/layer_sticky_position_constraint.proto

-// Copyright 2015 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 "point.proto";
-import "rect.proto";
-import "transform.proto";
-
-option optimize_for = LITE_RUNTIME;
-
-package cc.proto;
-
-message LayerStickyPositionConstraint {
-  optional bool is_sticky = 1;
-  optional bool is_anchored_left = 2;
-  optional bool is_anchored_right = 3;
-  optional bool is_anchored_top = 4;
-  optional bool is_anchored_bottom = 5;
-
-  optional float left_offset = 6;
-  optional float right_offset = 7;
-  optional float top_offset = 8;
-  optional float bottom_offset = 9;
-
-  optional Point parent_relative_sticky_box_offset = 12;
-  optional Rect scroll_container_relative_sticky_box_rect = 10;
-  optional Rect scroll_container_relative_containing_block_rect = 11;
-};