Relanding Switched main WebRTC browser tests to use a more realistic video

chrome/browser/media/webrtc_browsertest_common.h

Index: chrome/browser/media/webrtc_browsertest_common.h
diff --git a/chrome/browser/media/webrtc_browsertest_common.h b/chrome/browser/media/webrtc_browsertest_common.h
index 9d51c172b50e47eff8eec0bb61f34d61f131e3a0..56d3eceb25ed1c6062b22c7a14e5e7e93c102d59 100644
--- a/chrome/browser/media/webrtc_browsertest_common.h
+++ b/chrome/browser/media/webrtc_browsertest_common.h
@@ -7,12 +7,31 @@
 
 #include <string>
 
+#include "base/files/file_path.h"
 #include "base/process/process_handle.h"
 
 namespace content {
 class WebContents;
 }
 
+namespace test {
+
+// Reference video locations.
+
+// Checks if the user has the reference video files, returns true if so.
+// If the user's checkout don't have these dirs, they need to configure their
+// .gclient as described in kAdviseOnGclientSolution. The reason for this is
+// that we don't want to burden regular chrome devs with downloading these
+// sizable reference files by default.
+bool HasReferenceFilesInCheckout();
+
+// Retrieves the reference video dir, to which file names can be appended.
+base::FilePath GetReferenceVideosDir();
+
+extern const base::FilePath::CharType kReferenceFileName360p[];
+extern const base::FilePath::CharType kYuvFileExtension[];
+extern const base::FilePath::CharType kY4mFileExtension[];
+
 // Executes javascript code which will sleep for |timeout_msec| milliseconds.
 // Returns true on success.
 bool SleepInJavascript(content::WebContents* tab_contents, int timeout_msec);
@@ -44,10 +63,12 @@ class PeerConnectionServerRunner {
   // Stops the peerconnection server.
   bool Stop();
 
-  static void KillAllPeerConnectionServersOnCurrentSystem();
+  static void KillAllPeerConnectionServers();
 
  private:
   base::ProcessHandle server_pid_;
 };
 
+}  // namespace test
+
 #endif  // CHROME_BROWSER_MEDIA_WEBRTC_BROWSERTEST_COMMON_H_