Add external extensions json source in proper mac location.

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 0758f1ee8e4dc6730f45fcfe541384a52292acba..e92d5ec98b4edd3e618d73550b31a33af6871ef6 100644
--- a/chrome/common/chrome_paths.cc
+++ b/chrome/common/chrome_paths.cc
@@ -327,16 +327,9 @@ bool PathProvider(int key, FilePath* result) {
 #endif
     case chrome::DIR_EXTERNAL_EXTENSIONS:
 #if defined(OS_MACOSX)
-      if (!PathService::Get(base::DIR_EXE, &cur))
-        return false;
-
-      // On Mac, built-in extensions are in Contents/Extensions, a sibling of
-      // the App dir. If there are none, it may not exist.
-      // TODO(skerner): Reading external extensions from a file inside the
-      // app budle causes several problems.  Change this path to be outside
-      // the app bundle.  crbug/67203
-      cur = cur.DirName();
-      cur = cur.Append(FILE_PATH_LITERAL("Extensions"));
+      cur = FilePath(
+          FILE_PATH_LITERAL("/Library/Application Support/Google/Chrome"));
+      cur = cur.Append("External Extensions");
       create_dir = false;
 #else
       if (!PathService::Get(base::DIR_MODULE, &cur))
@@ -346,6 +339,22 @@ bool PathProvider(int key, FilePath* result) {
       create_dir = true;
 #endif
       break;
+
+#if defined(OS_MACOSX)
+    case DIR_DEPRICATED_EXTERNAL_EXTENSIONS:
+      // TODO(skerner): Reading external extensions from a file inside the
+      // app budle causes several problems.  Once users have a chance to
+      // migrate, remove this path.  crbug/67203
+      if (!PathService::Get(base::DIR_EXE, &cur))
+        return false;
+
+      cur = cur.DirName();
+      cur = cur.Append(FILE_PATH_LITERAL("Extensions"));
+      create_dir = false;
+
+      break;
+#endif
+
     default:
       return false;
   }