Make SkTextBlob::RunIterator public.

src/gpu/GrStencilAndCoverTextContext.cpp

Index: src/gpu/GrStencilAndCoverTextContext.cpp
diff --git a/src/gpu/GrStencilAndCoverTextContext.cpp b/src/gpu/GrStencilAndCoverTextContext.cpp
index ee1f1af4107ac17597732daeb5364d77581f8099..5289d092c7d0a37e6e00d0518a0e69194dfb8891 100644
--- a/src/gpu/GrStencilAndCoverTextContext.cpp
+++ b/src/gpu/GrStencilAndCoverTextContext.cpp
@@ -19,6 +19,7 @@
 #include "SkGpuDevice.h"
 #include "SkGrPriv.h"
 #include "SkPath.h"
+#include "SkTextBlobRunIterator.h"
 #include "SkTextMapStateProc.h"
 #include "SkTextFormatParams.h"
 
@@ -204,7 +205,7 @@ void GrStencilAndCoverTextContext::TextBlob::init(const SkTextBlob* skBlob,
                                                   const SkPaint& skPaint) {
     fCpuMemorySize = sizeof(TextBlob);
     SkPaint runPaint(skPaint);
-    for (SkTextBlob::RunIterator iter(skBlob); !iter.done(); iter.next()) {
+    for (SkTextBlobRunIterator iter(skBlob); !iter.done(); iter.next()) {
         iter.applyFontToPaint(&runPaint); // No need to re-seed the paint.
         TextRun* run = SkNEW_INSERT_AT_LLIST_TAIL(this, TextRun, (runPaint));