libvpx: Pull from upstream

source/libvpx/test/external_frame_buffer_test.cc

 /*
  *  Copyright (c) 2014 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 79 matching lines @@
     if (ext_fb_list_[idx].size < min_size) {
       delete [] ext_fb_list_[idx].data;
       ext_fb_list_[idx].data = NULL;
       ext_fb_list_[idx].size = min_size;
     }
 
     SetFrameBuffer(idx, fb);
     return 0;
   }
 
-  // Marks the external frame buffer that |fb| is pointing too as free.
+  // Marks the external frame buffer that |fb| is pointing to as free.
   // Returns < 0 on an error.
   int ReturnFrameBuffer(vpx_codec_frame_buffer_t *fb) {
-    EXPECT_TRUE(fb != NULL);
+    if (fb == NULL) {
+      EXPECT_TRUE(fb != NULL);
+      return -1;
+    }
     ExternalFrameBuffer *const ext_fb =
         reinterpret_cast<ExternalFrameBuffer*>(fb->priv);
-    EXPECT_TRUE(ext_fb != NULL);
+    if (ext_fb == NULL) {
+      EXPECT_TRUE(ext_fb != NULL);
+      return -1;
+    }
     EXPECT_EQ(1, ext_fb->in_use);
     ext_fb->in_use = 0;
     return 0;
   }
 
   // Checks that the ximage data is contained within the external frame buffer
   // private data passed back in the ximage.
   void CheckXImageFrameBuffer(const vpx_image_t *img) {
     if (img->fb_priv != NULL) {
       const struct ExternalFrameBuffer *const ext_fb =
@@ skipping 356 matching lines @@
             SetFrameBufferFunctions(
                 num_buffers, get_vp9_frame_buffer, release_vp9_frame_buffer));
 }
 #endif  // CONFIG_WEBM_IO
 
 VP9_INSTANTIATE_TEST_CASE(ExternalFrameBufferMD5Test,
                           ::testing::ValuesIn(libvpx_test::kVP9TestVectors,
                                               libvpx_test::kVP9TestVectors +
                                               libvpx_test::kNumVP9TestVectors));
 }  // namespace