[layoutng] Rename struct members to match style guide

third_party/WebKit/Source/core/layout/ng/ng_margin_strut.h

 // 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.
 
 #ifndef NGMarginStrut_h
 #define NGMarginStrut_h
 
 #include "core/CoreExport.h"
 #include "platform/LayoutUnit.h"
 
 namespace blink {
 
 // Stores the four margins of a box
 struct NGBoxMargins {
-  LayoutUnit inlineStart;
-  LayoutUnit inlineEnd;
-  LayoutUnit blockStart;
-  LayoutUnit blockEnd;
+  LayoutUnit inline_start;
+  LayoutUnit inline_end;
+  LayoutUnit block_start;
+  LayoutUnit block_end;
 
-  LayoutUnit inlineSum() const { return inlineStart + inlineEnd; }
-  LayoutUnit blockSum() const { return blockStart + blockEnd; }
+  LayoutUnit InlineSum() const { return inline_start + inline_end; }
+  LayoutUnit BlockSum() const { return block_start + block_end; }
 };
 
 // This struct is used for the margin collapsing calculation.
 struct NGMarginStrut {
-  LayoutUnit marginBlockStart;
-  LayoutUnit marginBlockEnd;
+  LayoutUnit margin_block_start;
+  LayoutUnit margin_block_end;
 
-  LayoutUnit negativeMarginBlockStart;
-  LayoutUnit negativeMarginBlockEnd;
+  LayoutUnit negative_margin_block_start;
+  LayoutUnit negative_margin_block_end;
 };
 
 }  // namespace blink
 
 #endif  // NGMarginStrut_h