[SkDebugger] Display run glyph positioning modes

src/utils/debugger/SkDrawCommand.cpp

Index: src/utils/debugger/SkDrawCommand.cpp
diff --git a/src/utils/debugger/SkDrawCommand.cpp b/src/utils/debugger/SkDrawCommand.cpp
index bb9f2f831d8bc48647a84e12e0a031a18343fbc5..eabc20ea765b2727ccd264d8ad4f175da0c5f4f5 100644
--- a/src/utils/debugger/SkDrawCommand.cpp
+++ b/src/utils/debugger/SkDrawCommand.cpp
@@ -675,6 +675,12 @@ void SkDrawPosTextHCommand::execute(SkCanvas* canvas) const {
     canvas->drawPosTextH(fText, fByteLength, fXpos, fConstY, fPaint);
 }
 
+static const char* gPositioningLabels[] = {
+    "kDefault_Positioning",
+    "kHorizontal_Positioning",
+    "kFull_Positioning",
+};
+
 SkDrawTextBlobCommand::SkDrawTextBlobCommand(const SkTextBlob* blob, SkScalar x, SkScalar y,
                                              const SkPaint& paint)
     : INHERITED(kDrawTextBlob_OpType)
@@ -699,6 +705,10 @@ SkDrawTextBlobCommand::SkDrawTextBlobCommand(const SkTextBlob* blob, SkScalar x,
         fInfo.push(label.release());
 
         fInfo.push(SkObjectParser::IntToString(iter.glyphCount(), "GlyphCount: "));
+        label.reset(new SkString("GlyphPositioning: "));
+        label->append(gPositioningLabels[iter.positioning()]);
+        fInfo.push(label.release());
+
         iter.applyFontToPaint(&runPaint);
         fInfo.push(SkObjectParser::PaintToString(runPaint));