Compute and use BiDi information in SVGTextMetricsBuilder

Source/core/rendering/svg/SVGTextMetrics.cpp

Index: Source/core/rendering/svg/SVGTextMetrics.cpp
diff --git a/Source/core/rendering/svg/SVGTextMetrics.cpp b/Source/core/rendering/svg/SVGTextMetrics.cpp
index e9bacb475efa3bb09d4aff152610f9d86a10aad6..3ab52797f77fa27b7f9b2c8fd12992fcf40ec402 100644
--- a/Source/core/rendering/svg/SVGTextMetrics.cpp
+++ b/Source/core/rendering/svg/SVGTextMetrics.cpp
@@ -62,6 +62,12 @@ SVGTextMetrics::SVGTextMetrics(RenderSVGInlineText* textRenderer, const TextRun&
 
 TextRun SVGTextMetrics::constructTextRun(RenderSVGInlineText* text, unsigned position, unsigned length)
 {
+    ASSERT(text->style());
+    return constructTextRun(text, position, length, text->style()->direction());
+}
+
+TextRun SVGTextMetrics::constructTextRun(RenderSVGInlineText* text, unsigned position, unsigned length, TextDirection textDirection)
+{
     RenderStyle* style = text->style();
     ASSERT(style);
 
@@ -70,7 +76,7 @@ TextRun SVGTextMetrics::constructTextRun(RenderSVGInlineText* text, unsigned pos
                 , 0 // xPos, only relevant with allowTabs=true
                 , 0 // padding, only relevant for justified text, not relevant for SVG
                 , TextRun::AllowTrailingExpansion
-                , style->direction()
+                , textDirection
                 , isOverride(style->unicodeBidi()) /* directionalOverride */);
 
     if (length) {
@@ -94,6 +100,12 @@ TextRun SVGTextMetrics::constructTextRun(RenderSVGInlineText* text, unsigned pos
     return run;
 }
 
+SVGTextMetrics SVGTextMetrics::measureCharacterRange(RenderSVGInlineText* text, unsigned position, unsigned length, TextDirection textDirection)
+{
+    ASSERT(text);
+    return SVGTextMetrics(text, constructTextRun(text, position, length, textDirection));
+}
+
 SVGTextMetrics SVGTextMetrics::measureCharacterRange(RenderSVGInlineText* text, unsigned position, unsigned length)
 {
     ASSERT(text);