Consolidate most simple vs. complex Font methods

Source/platform/text/TextRun.h

Index: Source/platform/text/TextRun.h
diff --git a/Source/platform/text/TextRun.h b/Source/platform/text/TextRun.h
index 4bac69429a4074df44ba494e1c26f6bd3871edf7..b1b13e0be8e77fee33539369b99d6a569d8611bb 100644
--- a/Source/platform/text/TextRun.h
+++ b/Source/platform/text/TextRun.h
@@ -27,11 +27,14 @@
 #include "platform/PlatformExport.h"
 #include "platform/fonts/Glyph.h"
 #include "platform/geometry/FloatRect.h"
+#include "platform/heap/Heap.h"
 #include "platform/text/TextDirection.h"
 #include "platform/text/TextPath.h"
 #include "wtf/RefCounted.h"
 #include "wtf/text/WTFString.h"
 
+class SkTextBlob;
+
 namespace blink {
 
 class FloatPoint;
@@ -257,10 +260,13 @@ inline void TextRun::setTabSize(bool allow, unsigned size)
 
 // Container for parameters needed to paint TextRun.
 struct TextRunPaintInfo {
+    STACK_ALLOCATED();
+public:
     explicit TextRunPaintInfo(const TextRun& r)
         : run(r)
         , from(0)
         , to(r.length())
+        , cachedTextBlob(nullptr)
     {
     }
 
@@ -268,6 +274,7 @@ struct TextRunPaintInfo {
     int from;
     int to;
     FloatRect bounds;
+    RefPtr<const SkTextBlob>* cachedTextBlob;
 };
 
 }