Support multiple disable reasons in ExtensionPerfs

chrome/common/extensions/extension.h

Index: chrome/common/extensions/extension.h
diff --git a/chrome/common/extensions/extension.h b/chrome/common/extensions/extension.h
index a991645308a5513276474924d2f77d63ce626c1f..c6b4717ebd0f11afe62e4b6966c8e79314831aaa 100644
--- a/chrome/common/extensions/extension.h
+++ b/chrome/common/extensions/extension.h
@@ -98,12 +98,19 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
   };
 
   // Used to record the reason an extension was disabled.
+  enum DeprecatedDisableReason {
+    DEPRECATED_DISABLE_UNKNOWN,
+    DEPRECATED_DISABLE_USER_ACTION,
+    DEPRECATED_DISABLE_PERMISSIONS_INCREASE,
+    DEPRECATED_DISABLE_RELOAD,
+    DEPRECATED_DISABLE_LAST,  // Not used.
+  };
+
   enum DisableReason {
-    DISABLE_UNKNOWN,
-    DISABLE_USER_ACTION,
-    DISABLE_PERMISSIONS_INCREASE,
-    DISABLE_RELOAD,
-    DISABLE_LAST,  // Not used.
+    DISABLE_NONE = 0,
+    DISABLE_USER_ACTION = 1 << 0,
+    DISABLE_PERMISSIONS_INCREASE = 1 << 1,
+    DISABLE_RELOAD = 1 << 2,
   };
 
   enum InstallType {