Don't attempt playback if not possible

chrome/browser/media/encrypted_media_browsertest.cc

Index: chrome/browser/media/encrypted_media_browsertest.cc
diff --git a/chrome/browser/media/encrypted_media_browsertest.cc b/chrome/browser/media/encrypted_media_browsertest.cc
index 6606284597e61993f157243b970e9039036c56fe..bac95ce63f98e68e6ca8e58dcf6fc3124c518764 100644
--- a/chrome/browser/media/encrypted_media_browsertest.cc
+++ b/chrome/browser/media/encrypted_media_browsertest.cc
@@ -416,6 +416,12 @@ class EncryptedMediaTest
 
   void TestMultiplePlayback(const std::string& encrypted_media,
                             const std::string& media_type) {
+    // TestSimplePlayback() checks for KEY_ERROR if playback is not possible.

[ddorwin, 2015/03/16 19:17:47]

Instead, I would follow the pattern at line 596.

[jrummell, 2015/03/16 20:13:06]

Done.

+    // Since this just runs playback twice, don't waste time if playback not
+    // possible.
+    if (!IsPlayBackPossible(CurrentKeySystem()))
+      return;
+
     RunEncryptedMediaTest(kDefaultEmePlayer, encrypted_media, media_type,
                           CurrentKeySystem(), CurrentSourceType(),
                           CurrentEmeVersion(), kNoSessionToLoad, false,