add --readJsonSummaryPath to render_pictures

tools/PictureRenderer.h

Index: tools/PictureRenderer.h
diff --git a/tools/PictureRenderer.h b/tools/PictureRenderer.h
index 445737e755f6b7505293f9496ca4d703db8e9cc2..342df7872abb417ded8dcc2a133d17b343fee2d8 100644
--- a/tools/PictureRenderer.h
+++ b/tools/PictureRenderer.h
@@ -219,7 +219,7 @@ public:
         fGridInfo.fTileInterval.set(width, height);
     }
 
-    void setJsonSummaryPtr(ImageResultsSummary* jsonSummaryPtr) {
+    void setJsonSummaryPtr(ImageResultsAndExpectations* jsonSummaryPtr) {
         fJsonSummaryPtr = jsonSummaryPtr;
     }
 
@@ -365,7 +365,7 @@ protected:
     SkAutoTUnref<SkCanvas> fCanvas;
     SkAutoTUnref<SkPicture> fPicture;
     bool                   fUseChecksumBasedFilenames;
-    ImageResultsSummary*   fJsonSummaryPtr;
+    ImageResultsAndExpectations*   fJsonSummaryPtr;
     SkDeviceTypes          fDeviceType;
     BBoxHierarchyType      fBBoxHierarchyType;
     DrawFilterFlags        fDrawFilters[SkDrawFilter::kTypeCount];