Add a basic support of text-align:right property to NGInlineLayoutAlgorithm.

third_party/WebKit/Source/core/layout/ng/inline/ng_line_box_fragment_builder.cc

 // Copyright 2017 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 "core/layout/ng/inline/ng_line_box_fragment_builder.h"
 
 #include "core/layout/ng/geometry/ng_logical_size.h"
 #include "core/layout/ng/inline/ng_inline_break_token.h"
 #include "core/layout/ng/inline/ng_inline_node.h"
 #include "core/layout/ng/inline/ng_physical_line_box_fragment.h"
@@ skipping 24 matching lines @@
   offsets_.push_back(child_offset);
 
   return *this;
 }
 
 void NGLineBoxFragmentBuilder::MoveChildrenInBlockDirection(LayoutUnit delta) {
   for (auto& offset : offsets_)
     offset.block_offset += delta;
 }
 
+void NGLineBoxFragmentBuilder::MoveChildrenInInlineDirection(LayoutUnit delta) {
+  NGWritingMode writing_mode(
+      FromPlatformWritingMode(node_->Style().GetWritingMode()));
+  LayoutUnit child_inline_size;
+  for (size_t i = 0; i < children_.size(); ++i) {
+    offsets_[i].inline_offset = delta + child_inline_size;
+    NGPhysicalFragment* child = children_[i].Get();
+    child_inline_size +=
+        child->Size().ConvertToLogical(writing_mode).inline_size;
+  }
+}
+
 void NGLineBoxFragmentBuilder::MoveChildrenInBlockDirection(LayoutUnit delta,
                                                             unsigned start,
                                                             unsigned end) {
   for (unsigned index = start; index < end; index++)
     offsets_[index].block_offset += delta;
 }
 
 void NGLineBoxFragmentBuilder::SetMetrics(const NGLineHeightMetrics& metrics) {
   metrics_ = metrics;
 }
@@ skipping 19 matching lines @@
         writing_mode, direction_, physical_size, child->Size()));
   }
 
   return AdoptRef(new NGPhysicalLineBoxFragment(
       physical_size, children_, metrics_,
       break_token_ ? std::move(break_token_)
                    : NGInlineBreakToken::Create(node_)));
 }
 
 }  // namespace blink