[layoutng] Rename struct members to match style guide

third_party/WebKit/Source/core/layout/ng/ng_fragment_base.cc

 // 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.
 
 #include "core/layout/ng/ng_fragment_base.h"
 #include "core/layout/ng/ng_fragment.h"
 #include "core/layout/ng/ng_text_fragment.h"
 
 namespace blink {
 
 NGFragmentBase::NGFragmentBase(NGLogicalSize size,
                                NGLogicalSize overflow,
                                NGWritingMode writing_mode,
                                NGDirection direction,
                                NGFragmentType type)
     : size_(size),
       overflow_(overflow),
       type_(type),
       writing_mode_(writing_mode),
       direction_(direction),
       has_been_placed_(false) {}
 
 void NGFragmentBase::SetOffset(LayoutUnit inline_offset,
                                LayoutUnit block_offset) {
   // setOffset should only be called once.
   DCHECK(!has_been_placed_);
-  offset_.inlineOffset = inline_offset;
-  offset_.blockOffset = block_offset;
+  offset_.inline_offset = inline_offset;
+  offset_.block_offset = block_offset;
   has_been_placed_ = true;
 }
 
 DEFINE_TRACE(NGFragmentBase) {
   if (Type() == FragmentText)
     static_cast<NGTextFragment*>(this)->traceAfterDispatch(visitor);
   else
     static_cast<NGFragment*>(this)->traceAfterDispatch(visitor);
 }
 
 }  // namespace blink