Add SVG Text to support the CSS 'text-orientation' property

third_party/WebKit/Source/core/layout/svg/SVGTextMetrics.h

Index: third_party/WebKit/Source/core/layout/svg/SVGTextMetrics.h
diff --git a/third_party/WebKit/Source/core/layout/svg/SVGTextMetrics.h b/third_party/WebKit/Source/core/layout/svg/SVGTextMetrics.h
index 469ee41c182f4ed6a8eff383aaedd28de9fb90a1..11b4eb19304a9014c08c58bc5c13fc36c92f77f1 100644
--- a/third_party/WebKit/Source/core/layout/svg/SVGTextMetrics.h
+++ b/third_party/WebKit/Source/core/layout/svg/SVGTextMetrics.h
@@ -25,6 +25,7 @@
 
 namespace blink {
 
+enum class FontOrientation;
 class LayoutSVGInlineText;
 class TextRun;
 
@@ -48,6 +49,7 @@ public:
     void setWidth(float width) { m_width = width; }
 
     float height() const { return m_height; }
+    float advance(FontOrientation) const;
     unsigned length() const { return m_length; }
 
 private: