cc/blimp: Remove the LayerTreeSettings serialization.

cc/proto/compositor_message_to_impl.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";
 
 option optimize_for = LITE_RUNTIME;
 
 import "commit_earlyout_reason.proto";
 import "layer_tree_host.proto";
-import "layer_tree_settings.proto";
 import "rect.proto";
 
 package cc.proto;
 
 // Control messages sent to the impl side of the compositor (client) from the
 // main side of the compositor (server).
 // Note: Unless specified in a comment, all fields in a message are required,
 // even if listed as optional.
 
 // Commit Flow: The commit flow defines the protocol for data exchange between
@@ skipping 61 matching lines @@
     BEGIN_MAIN_FRAME_ABORTED = 7;
 
     // Sent when a redraw is requested for the given damaged rect.
     SET_NEEDS_REDRAW = 8;
   }
 
   optional Type message_type = 1;
 
   // Only one of the following fields will be set per CompositorMessageToImpl.
 
-  // Set for message Type::INITIALIZE_IMPL.
-  optional InitializeImpl initialize_impl_message = 2;
-
   // Set for message Type::SET_DEFER_COMMITS.
   optional SetDeferCommits defer_commits_message = 3;
 
   // Set for message Type::START_COMMIT.
   optional StartCommit start_commit_message = 4;
 
   // Set for message Type::BEGIN_MAIN_FRAME_ABORTED.
   optional BeginMainFrameAborted begin_main_frame_aborted_message = 5;
 
   // Set for message Type::SET_NEEDS_REDRAW.
   optional SetNeedsRedraw set_needs_redraw_message = 6;
 }
 
-// The embedder of the remote client compositor should process the
-// InitializeImpl message to retrieve the LayerTreeSettings sent from the
-// server. The settings sent from the server may be modified by the embedder.
-message InitializeImpl {
-  optional LayerTreeSettings layer_tree_settings = 1;
-}
-
 message SetDeferCommits {
   // If set to true, the client will defer sending any BEGIN_MAIN_FRAME messages
   // to start a commit. The server must send a message with defer_commits set to
   // false to allow the client to start commits.
   // Note: If a pending commit request from the server was throttled if the
   // client was defering commits, it will be honoured after the server informs
   // the client to start commits.
   optional bool defer_commits = 1;
 }
 
 message StartCommit {
   optional LayerTreeHost layer_tree_host = 1;
 }
 
 message BeginMainFrameAborted {
   optional CommitEarlyOutReason reason = 1;
 }
 
 message SetNeedsRedraw {
   optional Rect damaged_rect = 1;
 }