Roll Chrome into Mojo.

third_party/harfbuzz-ng/src/hb-ot-hhea-table.hh

Index: third_party/harfbuzz-ng/src/hb-ot-hhea-table.hh
diff --git a/third_party/harfbuzz-ng/src/hb-ot-hhea-table.hh b/third_party/harfbuzz-ng/src/hb-ot-hhea-table.hh
index d433200165cb4bc6c971c765f25ebaeba84dd804..edc0e29cbfbcb6c4337573752d52d28f015a9bb3 100644
--- a/third_party/harfbuzz-ng/src/hb-ot-hhea-table.hh
+++ b/third_party/harfbuzz-ng/src/hb-ot-hhea-table.hh
@@ -35,14 +35,19 @@ namespace OT {
 
 /*
  * hhea -- The Horizontal Header Table
+ * vhea -- The Vertical Header Table
  */
 
 #define HB_OT_TAG_hhea HB_TAG('h','h','e','a')
+#define HB_OT_TAG_vhea HB_TAG('v','h','e','a')
 
 
-struct hhea
+struct _hea
 {
-  static const hb_tag_t tableTag	= HB_OT_TAG_hhea;
+  static const hb_tag_t tableTag = HB_TAG('_','h','e','a');
+
+  static const hb_tag_t hheaTag	= HB_OT_TAG_hhea;
+  static const hb_tag_t vheaTag	= HB_OT_TAG_vhea;
 
   inline bool sanitize (hb_sanitize_context_t *c) {
     TRACE_SANITIZE (this);
@@ -51,45 +56,45 @@ struct hhea
 
   public:
   FixedVersion	version;		/* 0x00010000u for version 1.0. */
-  FWORD		ascender;		/* Typographic ascent. <a
-					 * href="http://developer.apple.com/fonts/TTRefMan/RM06/Chap6hhea.html">
-					 * (Distance from baseline of highest
-					 * ascender)</a> */
-  FWORD		descender;		/* Typographic descent. <a
-					 * href="http://developer.apple.com/fonts/TTRefMan/RM06/Chap6hhea.html">
-					 * (Distance from baseline of lowest
-					 * descender)</a> */
-  FWORD		lineGap;		/* Typographic line gap. Negative
-					 * LineGap values are treated as zero
-					 * in Windows 3.1, System 6, and
-					 * System 7. */
-  UFWORD	advanceWidthMax;	/* Maximum advance width value in
-					 * 'hmtx' table. */
-  FWORD		minLeftSideBearing;	/* Minimum left sidebearing value in
-					 * 'hmtx' table. */
-  FWORD		minRightSideBearing;	/* Minimum right sidebearing value;
+  FWORD		ascender;		/* Typographic ascent. */
+  FWORD		descender;		/* Typographic descent. */
+  FWORD		lineGap;		/* Typographic line gap. */
+  UFWORD	advanceMax;		/* Maximum advance width/height value in
+					 * metrics table. */
+  FWORD		minLeadingBearing;	/* Minimum left/top sidebearing value in
+					 * metrics table. */
+  FWORD		minTrailingBearing;	/* Minimum right/bottom sidebearing value;
 					 * calculated as Min(aw - lsb -
-					 * (xMax - xMin)). */
-  FWORD		xMaxExtent;		/* Max(lsb + (xMax - xMin)). */
+					 * (xMax - xMin)) for horizontal. */
+  FWORD		maxExtent;		/* horizontal: Max(lsb + (xMax - xMin)),
+					 * vertical: minLeadingBearing+(yMax-yMin). */
   SHORT		caretSlopeRise;		/* Used to calculate the slope of the
-					 * cursor (rise/run); 1 for vertical. */
-  SHORT		caretSlopeRun;		/* 0 for vertical. */
+					 * cursor (rise/run); 1 for vertical caret,
+					 * 0 for horizontal.*/
+  SHORT		caretSlopeRun;		/* 0 for vertical caret, 1 for horizontal. */
   SHORT		caretOffset;		/* The amount by which a slanted
 					 * highlight on a glyph needs
 					 * to be shifted to produce the
 					 * best appearance. Set to 0 for
-					 * non--slanted fonts */
-  SHORT		reserved1;		/* set to 0 */
-  SHORT		reserved2;		/* set to 0 */
-  SHORT		reserved3;		/* set to 0 */
-  SHORT		reserved4;		/* set to 0 */
+					 * non-slanted fonts. */
+  SHORT		reserved1;		/* Set to 0. */
+  SHORT		reserved2;		/* Set to 0. */
+  SHORT		reserved3;		/* Set to 0. */
+  SHORT		reserved4;		/* Set to 0. */
   SHORT		metricDataFormat;	/* 0 for current format. */
-  USHORT	numberOfHMetrics;	/* Number of hMetric entries in 'hmtx'
-					 * table */
+  USHORT	numberOfLongMetrics;	/* Number of LongMetric entries in metric
+					 * table. */
   public:
   DEFINE_SIZE_STATIC (36);
 };
 
+struct hhea : _hea {
+  static const hb_tag_t tableTag	= HB_OT_TAG_hhea;
+};
+struct vhea : _hea {
+  static const hb_tag_t tableTag	= HB_OT_TAG_vhea;
+};
+
 
 } /* namespace OT */