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

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

Index: third_party/WebKit/Source/platform/fonts/GlyphBuffer.h
diff --git a/third_party/WebKit/Source/platform/fonts/GlyphBuffer.h b/third_party/WebKit/Source/platform/fonts/GlyphBuffer.h
index 879f8f43afb46e417bb0f87a7e41f617ef3997ee..f05a0d5ad37ac87f4aa576a7161b1a416c8aaee5 100644
--- a/third_party/WebKit/Source/platform/fonts/GlyphBuffer.h
+++ b/third_party/WebKit/Source/platform/fonts/GlyphBuffer.h
@@ -111,6 +111,36 @@ class GlyphBuffer {
     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;