cc: Remove all blimp code from cc.

cc/proto/skxfermode.proto

Index: cc/proto/skxfermode.proto
diff --git a/cc/proto/skxfermode.proto b/cc/proto/skxfermode.proto
deleted file mode 100644
index 349aa8b9ef405f9f87f802a4f7101e63fea99ac3..0000000000000000000000000000000000000000
--- a/cc/proto/skxfermode.proto
+++ /dev/null
@@ -1,46 +0,0 @@
-// 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";
-
-option optimize_for = LITE_RUNTIME;
-
-package cc.proto;
-
-message SkXfermode {
-  enum Mode {
-    CLEAR_ = 0;  // Clear() is a method for protos.
-    SRC = 1;
-    DST = 2;
-    SRC_OVER = 3;
-    DST_OVER = 4;
-    SRC_IN = 5;
-    DST_IN = 6;
-    SRC_OUT = 7;
-    DST_OUT = 8;
-    SRC_A_TOP = 9;
-    DST_A_TOP = 10;
-    XOR = 11;
-    PLUS = 12;
-    MODULATE = 13;
-
-    SCREEN = 14;
-
-    OVERLAY = 15;
-    DARKEN = 16;
-    LIGHTEN = 17;
-    COLOR_DODGE = 18;
-    COLOR_BURN = 19;
-    HARD_LIGHT = 20;
-    SOFT_LIGHT = 21;
-    DIFFERENCE_ = 22;
-    EXCLUSION = 23;
-    MULTIPLY = 24;
-
-    HUE = 25;
-    SATURATION = 26;
-    COLOR = 27;
-    LUMINOSITY = 28;
-  }
-}