fix dm crash

src/gpu/GrInOrderDrawBuffer.cpp

Index: src/gpu/GrInOrderDrawBuffer.cpp
diff --git a/src/gpu/GrInOrderDrawBuffer.cpp b/src/gpu/GrInOrderDrawBuffer.cpp
index 99725a512c05b7f2d41d49d6bfed9df01115c531..2a2b5b6912d77bfda3cc8340d443ae614ac10215 100644
--- a/src/gpu/GrInOrderDrawBuffer.cpp
+++ b/src/gpu/GrInOrderDrawBuffer.cpp
@@ -10,7 +10,7 @@
 // We will use the reordering buffer, unless we have NVPR.
 // TODO move NVPR to batch so we can reorder
 static inline bool allow_reordering(const GrCaps* caps) {
-    return !caps->shaderCaps()->pathRenderingSupport();
+    return caps && caps->shaderCaps() && !caps->shaderCaps()->pathRenderingSupport();
 }
 
 GrInOrderDrawBuffer::GrInOrderDrawBuffer(GrContext* context)