Remove all the ephemeral apps code.

extensions/common/extension.h

Index: extensions/common/extension.h
diff --git a/extensions/common/extension.h b/extensions/common/extension.h
index 75495fb8e29229cae32da041981c40cf417eac1a..a6b075340afec3fcb2bdb6a9ed42497c34371a57 100644
--- a/extensions/common/extension.h
+++ b/extensions/common/extension.h
@@ -102,8 +102,7 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
     DISABLE_GREYLIST = 1 << 9,
     DISABLE_CORRUPTED = 1 << 10,
     DISABLE_REMOTE_INSTALL = 1 << 11,
-    DISABLE_INACTIVE_EPHEMERAL_APP = 1 << 12,  // Cached ephemeral apps are
-                                               // disabled to prevent activity.
+    DISABLE_INACTIVE_EPHEMERAL_APP = 1 << 12,  // No longer used.

[Devlin, 2015/12/07 16:53:59]

rename to DEPRECATED?

[benwells, 2015/12/08 07:20:11]

Actually I used the pattern above for the other deprecated disable reasons.

     DISABLE_EXTERNAL_EXTENSION = 1 << 13,      // External extensions might be
                                                // disabled for user prompting.
     DISABLE_UPDATE_REQUIRED_BY_POLICY = 1 << 14,  // Doesn't meet minimum