Chrome app manifest support for action handlers.

extensions/common/manifest_constants.cc

Index: extensions/common/manifest_constants.cc
diff --git a/extensions/common/manifest_constants.cc b/extensions/common/manifest_constants.cc
index 8d6be3afc21a672ac34961fc5632c51e42d4c070..fb6b759dd734de92f68f5c87356734b2c43b809a 100644
--- a/extensions/common/manifest_constants.cc
+++ b/extensions/common/manifest_constants.cc
@@ -10,6 +10,7 @@ namespace extensions {
 namespace manifest_keys {
 
 const char kAboutPage[] = "about_page";
+const char kActionHandlers[] = "action_handlers";
 const char kAllFrames[] = "all_frames";
 const char kAltKey[] = "altKey";
 const char kApp[] = "app";
@@ -298,6 +299,10 @@ const char kFileNotFound[] = "File not found: *.";
 const char kInvalidAboutPage[] = "Invalid value for 'about_page'.";
 const char kInvalidAboutPageExpectRelativePath[] =
     "Invalid value for 'about_page'. Value must be a relative path.";
+const char kInvalidActionHandlersActionType[] =
+    "Invalid entry in 'action_handlers': \"*\".";
+const char kInvalidActionHandlersType[] =
+    "Invalid value for 'action_handlers'. Value must be a list of strings.";
 const char kInvalidAllFrames[] =
     "Invalid value for 'content_scripts[*].all_frames'.";
 const char kInvalidAppIconColor[] = "Invalid value for app.icon_color.";