Removed duplicated JS hasVideoInputDeviceOnSystem() test helper

chrome/browser/media/webrtc_browsertest_base.cc

Index: chrome/browser/media/webrtc_browsertest_base.cc
diff --git a/chrome/browser/media/webrtc_browsertest_base.cc b/chrome/browser/media/webrtc_browsertest_base.cc
index 4e574ab9b3fd090462a58125f5cd608f73d60be2..1a69c9cf6ef4ef148dd3bc6e1144787f8c4ded87 100644
--- a/chrome/browser/media/webrtc_browsertest_base.cc
+++ b/chrome/browser/media/webrtc_browsertest_base.cc
@@ -428,13 +428,6 @@ std::string WebRtcTestBase::GetStreamSize(
   return result.substr(3);
 }
 
-bool WebRtcTestBase::HasWebcamAvailableOnSystem(
-    content::WebContents* tab_contents) const {
-  std::string result =
-      ExecuteJavascript("hasVideoInputDeviceOnSystem();", tab_contents);
-  return result == "has-video-input-device";
-}
-
 bool WebRtcTestBase::OnWin8() const {
 #if defined(OS_WIN)
   return base::win::GetVersion() > base::win::VERSION_WIN7;