Verify returned frames from media::VideoFrame::Wrap*() methods

media/capture/content/thread_safe_capture_oracle.cc

Index: media/capture/content/thread_safe_capture_oracle.cc
diff --git a/media/capture/content/thread_safe_capture_oracle.cc b/media/capture/content/thread_safe_capture_oracle.cc
index 0c62e697e54f93cb009eb71215227817dfcd7210..af78616caa4a346b900b4c748b65126020348a5b 100644
--- a/media/capture/content/thread_safe_capture_oracle.cc
+++ b/media/capture/content/thread_safe_capture_oracle.cc
@@ -120,7 +120,8 @@ bool ThreadSafeCaptureOracle::ObserveEventAndDecideCapture(
       gfx::Rect(visible_size), visible_size,
       static_cast<uint8*>(output_buffer->data()), output_buffer->mapped_size(),
       base::SharedMemory::NULLHandle(), 0u, base::TimeDelta());
-  DCHECK(*storage);
+  if (!(*storage))
+    return false;
   *callback =
       base::Bind(&ThreadSafeCaptureOracle::DidCaptureFrame, this, frame_number,
                  base::Passed(&output_buffer), capture_begin_time,