Removed duplicated JS hasVideoInputDeviceOnSystem() test helper

chrome/browser/media/webrtc/webrtc_browsertest_base.h

Index: chrome/browser/media/webrtc/webrtc_browsertest_base.h
diff --git a/chrome/browser/media/webrtc/webrtc_browsertest_base.h b/chrome/browser/media/webrtc/webrtc_browsertest_base.h
index 1857bc7b787faffabb79db2ac59f9af5e51ef1ee..c33b2f514b47806ab671079829daa91a9f330e5a 100644
--- a/chrome/browser/media/webrtc/webrtc_browsertest_base.h
+++ b/chrome/browser/media/webrtc/webrtc_browsertest_base.h
@@ -151,9 +151,6 @@ class WebRtcTestBase : public InProcessBrowserTest {
   std::string GetStreamSize(content::WebContents* tab_contents,
                             const std::string& video_element) const;
 
-  // Methods to check what devices we have on the system.
-  bool HasWebcamAvailableOnSystem(content::WebContents* tab_contents) const;
-
   // Returns true if we're on win 8.
   bool OnWin8() const;