Allow supporting older PICTURE_VERSIONs.

src/core/SkPicture.cpp

Index: src/core/SkPicture.cpp
diff --git a/src/core/SkPicture.cpp b/src/core/SkPicture.cpp
index 1ff58656512681ed5ac056d1399f9558c33f0c91..39d0653a1b5ac3528e10d14fafda891a047e4299 100644
--- a/src/core/SkPicture.cpp
+++ b/src/core/SkPicture.cpp
@@ -6,7 +6,7 @@
  * found in the LICENSE file.
  */
 
-
+#include "SkErrorInternals.h"
 #include "SkPictureFlat.h"
 #include "SkPicturePlayback.h"
 #include "SkPictureRecord.h"
@@ -283,9 +283,13 @@ void SkPicture::initFromStream(SkStream* stream, bool* success, InstallPixelRefP
     SkPictInfo info;
 
     if (!stream->read(&info, sizeof(info))) {
+        SkErrorInternals::SetError(kParseError_SkError, "Failed to parse skp info.");
         return;
     }
-    if (PICTURE_VERSION != info.fVersion) {
+
+    if (info.fVersion < 10 || info.fVersion > PICTURE_VERSION) {

[scroggo, 2013/04/29 19:00:40]

This needs to be duplicated in QT/SkDebuggerGUI.cpp in order to play back the
older skp files.

+        SkErrorInternals::SetError(kParseError_SkError, "skp version %d not supported.",
+                                   info.fVersion);
         return;
     }