don't rely on fonts having a stream

src/gpu/gl/GrGLPathRendering.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gl/GrGLPathRendering.h"
 #include "gl/GrGLNameAllocator.h"
 #include "gl/GrGLUtil.h"
@@ skipping 95 matching lines @@
     if (NULL != desc || !caps().glyphLoadingSupport || stroke.isDashed()) {
         return GrPathRendering::createGlyphs(typeface, desc, stroke);
     }
 
     if (NULL == typeface) {
         typeface = SkTypeface::GetDefaultTypeface();
         SkASSERT(NULL != typeface);
     }
 
     int faceIndex;
-    SkAutoTDelete<SkStream> fontStream(typeface->openStream(&faceIndex));
+    SkStreamAsset* asset = typeface->openStream(&faceIndex);
+    if (!asset) {
+        return GrPathRendering::createGlyphs(typeface, NULL, stroke);
+    }
+    SkAutoTDelete<SkStream> fontStream(asset);
 
     const size_t fontDataLength = fontStream->getLength();
     if (0 == fontDataLength) {
         return GrPathRendering::createGlyphs(typeface, NULL, stroke);
     }
 
     SkTArray<uint8_t> fontTempBuffer;
     const void* fontData = fontStream->getMemoryBase();
     if (NULL == fontData) {
         // TODO: Find a more efficient way to pass the font data (e.g. open file descriptor).
@@ skipping 276 matching lines @@
 
     GL_CALL(StencilStrokePathInstanced(numPaths, pathNameType, paths, pathBase,
                                        reference, mask, transformType, transformValues));
     GL_CALL(CoverStrokePathInstanced(numPaths, pathNameType, paths, pathBase,
                                      coverMode, transformType, transformValues));
 }
 
 inline GrGLGpu* GrGLPathRendering::gpu() {
     return static_cast<GrGLGpu*>(fGpu);
 }