Add browser test for getusermedia and unavailable audio device.

content/browser/webrtc/webrtc_getusermedia_browsertest.cc

Index: content/browser/webrtc/webrtc_getusermedia_browsertest.cc
diff --git a/content/browser/webrtc/webrtc_getusermedia_browsertest.cc b/content/browser/webrtc/webrtc_getusermedia_browsertest.cc
index 36bb9a64721b67b898decb7dd4ac7374e2be8838..00a97c312ac6610e7b1ee28409e915c247b69153 100644
--- a/content/browser/webrtc/webrtc_getusermedia_browsertest.cc
+++ b/content/browser/webrtc/webrtc_getusermedia_browsertest.cc
@@ -23,6 +23,7 @@
 #include "content/public/test/content_browser_test_utils.h"
 #include "content/public/test/test_utils.h"
 #include "content/shell/browser/shell.h"
+#include "media/audio/audio_manager.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 #include "testing/perf/perf_test.h"
 
@@ -579,6 +580,29 @@ IN_PROC_BROWSER_TEST_F(WebRtcGetUserMediaBrowserTest,
             ExecuteJavascriptAndReturnResult(call));
 }
 
+#if defined(OS_ANDROID)
+// Disabled until http://crbug.com/679302 is fixed.
+#define MAYBE_GetUserMediaFailToAccessAudioDevice \
+    DISABLED_GetUserMediaFailToAccessAudioDevice
+#else
+#define MAYBE_GetUserMediaFailToAccessAudioDevice \
+    GetUserMediaFailToAccessAudioDevice
+#endif
+IN_PROC_BROWSER_TEST_F(WebRtcGetUserMediaBrowserTest,
+                       MAYBE_GetUserMediaFailToAccessAudioDevice) {
+  ASSERT_TRUE(embedded_test_server()->Start());
+
+  GURL url(embedded_test_server()->GetURL("/media/getusermedia.html"));
+  NavigateToURL(shell(), url);
+
+  media::AudioManager::Get()->SetMaxStreamCountForTesting(0, 0);

[henrika (OOO until Aug 14), 2017/01/16 09:13:27]

Perhaps a comment explaining why we know the test should fail after calling this
method. Just an idea.

[tommi (sloooow) - chröme, 2017/01/16 12:37:01]

Done.

+
+  const std::string call = base::StringPrintf(
+      "%s({video: false, audio: true});", kGetUserMediaAndExpectFailure);
+  EXPECT_EQ("TrackStartError",
+            ExecuteJavascriptAndReturnResult(call));
+}
+
 // This test makes two getUserMedia requests, one with impossible constraints
 // that should trigger an error, and one with valid constraints. The test
 // verifies getUserMedia can succeed after being given impossible constraints.