Turn SVGTextMetricsBuilder into a namespace

Source/core/rendering/svg/SVGTextMetricsBuilder.cpp

Index: Source/core/rendering/svg/SVGTextMetricsBuilder.cpp
diff --git a/Source/core/rendering/svg/SVGTextMetricsBuilder.cpp b/Source/core/rendering/svg/SVGTextMetricsBuilder.cpp
index 344c023aa4ed64ed9eec868fb3483e8ef4ed66df..5bac22f285e59b086e211f7a27742a375222fe96 100644
--- a/Source/core/rendering/svg/SVGTextMetricsBuilder.cpp
+++ b/Source/core/rendering/svg/SVGTextMetricsBuilder.cpp
@@ -129,7 +129,7 @@ struct MeasureTextData {
     unsigned valueListPosition;
 };
 
-void SVGTextMetricsBuilder::measureTextRenderer(RenderSVGInlineText* text, MeasureTextData* data, bool processRenderer)
+static void measureTextRenderer(RenderSVGInlineText* text, MeasureTextData* data, bool processRenderer)
 {
     ASSERT(text);
 
@@ -185,7 +185,7 @@ void SVGTextMetricsBuilder::measureTextRenderer(RenderSVGInlineText* text, Measu
     data->valueListPosition += textPosition - skippedCharacters;
 }
 
-void SVGTextMetricsBuilder::walkTree(RenderObject* start, RenderSVGInlineText* stopAtLeaf, MeasureTextData* data)
+static void walkTree(RenderObject* start, RenderSVGInlineText* stopAtLeaf, MeasureTextData* data)
 {
     RenderObject* child = start->firstChild();
     while (child) {