Trigger computation of font size when crossing foreignObject boundary

Source/core/css/resolver/FontBuilder.h

Index: Source/core/css/resolver/FontBuilder.h
diff --git a/Source/core/css/resolver/FontBuilder.h b/Source/core/css/resolver/FontBuilder.h
index 3a24f72120f95d9f5e412f47c94745a22d8de02f..8367a1df36ede226769c0c86f01264e6fffc8744 100644
--- a/Source/core/css/resolver/FontBuilder.h
+++ b/Source/core/css/resolver/FontBuilder.h
@@ -42,8 +42,13 @@ class FontBuilder {
 public:
     FontBuilder();
 
+    enum FontBuilderOperation {
+        OnlyBuildFontOnChange,
+        AlwaysBuildFont,
+    };
+
     // FIXME: The name is probably wrong, but matches StyleResolverState callsite for consistency.
-    void initForStyleResolve(const Document&, RenderStyle*, bool useSVGZoomRules);
+    void initForStyleResolve(const Document&, RenderStyle*, FontBuilderOperation = OnlyBuildFontOnChange);

[pdr., 2014/06/03 16:40:46]

Could you add a comment here explaining why one would need to use
AlwaysBuildFont? I think I understand in the context of this patch but it isn't
obvious to a naive caller of this.

 
     void setInitial(float effectiveZoom);
 
@@ -112,7 +117,6 @@ private:
     float getComputedSizeFromSpecifiedSize(FontDescription&, float effectiveZoom, float specifiedSize);
 
     const Document* m_document;
-    bool m_useSVGZoomRules;
     bool m_fontSizehasViewportUnits;
     // FIXME: This member is here on a short-term lease. The plan is to remove
     // any notion of RenderStyle from here, allowing FontBuilder to build Font objects