Propagate validation errors

src/core/SkPicturePlayback.cpp

Index: src/core/SkPicturePlayback.cpp
diff --git a/src/core/SkPicturePlayback.cpp b/src/core/SkPicturePlayback.cpp
index 2ffb6c20d1b993ce8830462f54623c94b93050f5..1aa4712d4f5699cf1307e1ece2fd18b54e25e56e 100644
--- a/src/core/SkPicturePlayback.cpp
+++ b/src/core/SkPicturePlayback.cpp
@@ -82,7 +82,7 @@ void get_text(SkReadBuffer* reader, TextContainer* text) {
 
 void SkPicturePlayback::draw(SkCanvas* canvas,
                              SkPicture::AbortCallback* callback,
-                             const SkReadBuffer* buffer) {
+                             SkReadBuffer* buffer) {
     AutoResetOpID aroi(this);
     SkASSERT(0 == fCurOffset);
 
@@ -114,6 +114,11 @@ void SkPicturePlayback::draw(SkCanvas* canvas,
 
         this->handleOp(reader, op, size, canvas, initialMatrix);
     }
+
+    // need to propagate invalid state to the parent reader
+    if (buffer) {
+        buffer->validate(reader->isValid());
+    }
 }
 
 void SkPicturePlayback::handleOp(SkReadBuffer* reader,