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

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

Index: third_party/WebKit/Source/core/layout/svg/SVGTextMetrics.cpp
diff --git a/third_party/WebKit/Source/core/layout/svg/SVGTextMetrics.cpp b/third_party/WebKit/Source/core/layout/svg/SVGTextMetrics.cpp
index ebfd859af892863aa840d21f7b3b60ff96defe81..b55074a2e70a2cf3ba76a88cd086f4ab90c7d84e 100644
--- a/third_party/WebKit/Source/core/layout/svg/SVGTextMetrics.cpp
+++ b/third_party/WebKit/Source/core/layout/svg/SVGTextMetrics.cpp
@@ -22,6 +22,7 @@
 #include "core/layout/svg/SVGTextMetrics.h"
 
 #include "core/layout/svg/LayoutSVGInlineText.h"
+#include "platform/fonts/FontOrientation.h"
 
 namespace blink {
 
@@ -103,4 +104,18 @@ SVGTextMetrics::SVGTextMetrics(LayoutSVGInlineText* text, unsigned length, float
     m_length = length;
 }
 
+float SVGTextMetrics::advance(FontOrientation orientation) const
+{
+    switch (orientation) {
+    case FontOrientation::Horizontal:
+    case FontOrientation::VerticalRotated:
+        return width();
+    case FontOrientation::VerticalUpright:
+        return height();
+    default:
+        ASSERT_NOT_REACHED();
+        return width();
+    }
+}
+
 }