Do not use bundles for the CDM on Mac.

chrome/common/chrome_paths.cc

Index: chrome/common/chrome_paths.cc
diff --git a/chrome/common/chrome_paths.cc b/chrome/common/chrome_paths.cc
index abe5da30baf5dcb2d74b9d6d30df55046b2bf062..6794d68cf8ed647b6cbac4e80d5e419e3f442392 100644
--- a/chrome/common/chrome_paths.cc
+++ b/chrome/common/chrome_paths.cc
@@ -363,8 +363,28 @@ bool PathProvider(int key, base::FilePath* result) {
       cur = cur.Append(kWidevineCdmBaseDirectory);
       break;
     case chrome::FILE_WIDEVINE_CDM_PLUGIN:
+#if defined(OS_MACOSX)
+      // This is only for testing. The production path uses DIR_WIDEVINE_CDM.
+      // Find the adapter (and CDM) in the directory where it gets built.
+      // Use DIR_MODULE because it is consistent in both browser and renderers.
+      if (!PathService::Get(base::DIR_MODULE, &cur))
+        return false;
+      if (base::mac::AmIBundled()) {
+        // If we're called from chrome, it's beside the app (outside the
+        // app bundle), if we're called from a unittest, we'll already be
+        // outside the bundle so use the exe dir.
+        // DIR_MODULE gave us .../

[xhwang, 2013/05/02 19:39:17]

what's .../ ?

[ddorwin, 2013/05/02 20:35:57]

Done.

+        // Chromium.app/Contents/Versions/<v>/Google Chrome Framework.framework.
+        cur = cur.DirName();
+        cur = cur.DirName();
+        cur = cur.DirName();
+        cur = cur.DirName();
+        cur = cur.DirName();

[xhwang, 2013/05/02 19:39:17]

why call this 5 times?

[ddorwin, 2013/05/02 20:35:57]

Each one returns the parent directory I guess. The result is the equivalent of
evaluating "../". I copied this from the pnacl code in this file.

+      }
+#else
       if (!GetInternalPluginsDirectory(&cur))
         return false;
+#endif
       cur = cur.Append(kWidevineCdmPluginFileName);
       break;
 #endif