Ensure that WebRTC AEC recording checkbox is not set if cancelling file dialog.

content/browser/media/webrtc_internals_unittest.cc

Index: content/browser/media/webrtc_internals_unittest.cc
diff --git a/content/browser/media/webrtc_internals_unittest.cc b/content/browser/media/webrtc_internals_unittest.cc
index e8fe15e906083bb4e3ce201014aeed69aee8ee37..e4b0531fa54f160d064433d0acf9ca8d97d33a5b 100644
--- a/content/browser/media/webrtc_internals_unittest.cc
+++ b/content/browser/media/webrtc_internals_unittest.cc
@@ -23,7 +23,8 @@ class MockWebRTCInternalsProxy : public WebRTCInternalsUIObserver {
   virtual void OnUpdate(const std::string& command,
                         const base::Value* value) OVERRIDE {
     command_ = command;
-    value_.reset(value->DeepCopy());
+    if (value)
+      value_.reset(value->DeepCopy());
   }
 
   std::string command() {
@@ -270,4 +271,12 @@ TEST_F(WebRTCInternalsTest, OnAddStats) {
   VerifyList(dict, "reports", list);
 }
 
+TEST_F(WebRTCInternalsTest, AecRecordingFileSelectionCanceled) {
+  scoped_ptr<MockWebRTCInternalsProxy> observer(new MockWebRTCInternalsProxy());
+  WebRTCInternals::GetInstance()->AddObserver(observer.get());
+  WebRTCInternals::GetInstance()->FileSelectionCanceled(NULL);
+  EXPECT_EQ("aecRecordingFileSelectionCancelled", observer->command());
+  EXPECT_EQ(NULL, observer->value());
+}
+
 }  // namespace content