Fix up GrAuditTrail to allow arbitrary reordering

tools/skiaserve/Request.cpp

Index: tools/skiaserve/Request.cpp
diff --git a/tools/skiaserve/Request.cpp b/tools/skiaserve/Request.cpp
index 46e3039aad95acfddf651f13d1eb701d1769adfd..86527f81d95e0c0e68f72e66c73ecbc92394220f 100644
--- a/tools/skiaserve/Request.cpp
+++ b/tools/skiaserve/Request.cpp
@@ -150,6 +150,7 @@ bool Request::initPictureFromStream(SkStream* stream) {
 
     // for some reason we need to 'flush' the debug canvas by drawing all of the ops
     fDebugCanvas->drawTo(this->getCanvas(), this->getLastOp());
+    this->getCanvas()->flush();
     return true;
 }