Add multiline braille support.

chrome/browser/extensions/api/braille_display_private/braille_display_private_api.cc

 // Copyright 2013 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.
 
 #include "chrome/browser/extensions/api/braille_display_private/braille_display_private_api.h"
 
 #include <utility>
 
 #include "base/lazy_instance.h"
 #include "build/build_config.h"
@@ skipping 155 matching lines @@
 ~BrailleDisplayPrivateWriteDotsFunction() {
 }
 
 bool BrailleDisplayPrivateWriteDotsFunction::Prepare() {
   params_ = WriteDots::Params::Create(*args_);
   EXTENSION_FUNCTION_VALIDATE(params_);
   return true;
 }
 
 void BrailleDisplayPrivateWriteDotsFunction::Work() {
-  BrailleController::GetInstance()->WriteDots(params_->cells);
+  std::vector<std::vector<char>> input;
+
+  for (int i = 0; i < params_->rows; i++) {
+    input.push_back(std::vector<char>(params_->columns));
+    for (int j = 0; j < params_->columns; j++) {
+      input[i][j] = params_->cells[i * params_->columns + j];
+    }
+  }
+  BrailleController::GetInstance()->WriteDots(input);
 }
 
 bool BrailleDisplayPrivateWriteDotsFunction::Respond() {
   return true;
 }
 }  // namespace api
 }  // namespace extensions