Fix client-side phishing detection test flakiness and ChromeOS failure.

content/test/webrtc_audio_device_test.h

Index: content/test/webrtc_audio_device_test.h
diff --git a/content/test/webrtc_audio_device_test.h b/content/test/webrtc_audio_device_test.h
index 1e136f26c641475a126e90db9d0013796c2d56a0..3f53cf3a82567b15e6f8829d703c5eb05b46debf 100644
--- a/content/test/webrtc_audio_device_test.h
+++ b/content/test/webrtc_audio_device_test.h
@@ -188,6 +188,10 @@ class WebRTCAudioDeviceTest
   // These are initialized when we set up our IO thread.
   bool has_input_devices_;
   bool has_output_devices_;
+
+  // The previous state for whether sandbox support was enabled in
+  // RenderViewWebKitPlatformSupportImpl.
+  bool sandbox_was_enabled_;
 };
 
 // A very basic implementation of webrtc::Transport that acts as a transport