WTF/std normalization: replace WTF::Vector::last with ::back

third_party/WebKit/Source/platform/fonts/GlyphBuffer.h

 /*
  * Copyright (C) 2006, 2009, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2007-2008 Torch Mobile Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 93 matching lines @@
   void add(Glyph glyph, const SimpleFontData* font, const FloatPoint& offset) {
     // cannot mix x-only/xy offsets
     ASSERT(isEmpty() || hasVerticalOffsets());
 
     m_fontData.append(font);
     m_glyphs.append(glyph);
     m_offsets.append(offset.x());
     m_offsets.append(offset.y());
   }
 
+  void reverseForSimpleRTL(float afterOffset, float totalWidth) {
+    ASSERT(!hasVerticalOffsets());
+
+    if (isEmpty())
+      return;
+
+    m_fontData.reverse();
+    m_glyphs.reverse();
+
+    // | .. [X0 X1 ..   Xn]     ..   |
+    // ^                   ^         ^
+    // 0             afterOffset totalWidth
+    //
+    // The input buffer is shaped using RTL advances, but since the right edge
+    // is unknown at that time, offsets are computed as if the advances were
+    // LTR. This method performs the required adjustments by reconstructing
+    // advances and positioning offsets in an RTL progression.
+
+    // FIXME: we should get rid of this (idea: store negative offsets while
+    //        shaping, and adjust the initial advance accordingly -> should
+    //        yield correctly positioned RTL glyphs without any post-shape
+    //        munging).
+    SECURITY_DCHECK(!m_offsets.isEmpty());
+    for (unsigned i = 0; i + 1 < m_offsets.size(); ++i)
+      m_offsets[i] = totalWidth - m_offsets[i + 1];
+    m_offsets.back() = totalWidth - afterOffset;
+
+    m_offsets.reverse();
+  }
+
  protected:
   Vector<const SimpleFontData*, 2048> m_fontData;
   Vector<Glyph, 2048> m_glyphs;
 
   // Glyph positioning: either x-only offsets, or interleaved x,y offsets
   // (depending on the buffer-wide positioning mode). This matches the
   // glyph positioning format used by Skia.
   Vector<float, 2048> m_offsets;
 };
 
 }  // namespace blink
 
 #endif