Renderer changes for wiring up shared memory with declarative injection

extensions/common/extension_messages.h

Index: extensions/common/extension_messages.h
diff --git a/extensions/common/extension_messages.h b/extensions/common/extension_messages.h
index fc3071fc9dcada1e1bd972b3d5a555fa26bf1263..9fa9566b34f91c6d93bf5017e0bf56e409d2b7df 100644
--- a/extensions/common/extension_messages.h
+++ b/extensions/common/extension_messages.h
@@ -406,6 +406,13 @@ IPC_MESSAGE_CONTROL3(ExtensionMsg_UpdateUserScripts,
                      extensions::ExtensionId /* owner */,
                      std::set<std::string> /* changed extensions */)
 
+// Trigger to execute declarative content script under browser control.
+IPC_MESSAGE_ROUTED4(ExtensionMsg_ExecuteDeclarativeScript,
+                    int /* tab identifier */,
+                    extensions::ExtensionId /* extension identifier */,
+                    int64 /* script identifier */,
+                    GURL /* page URL where script should be injected */)
+
 // Tell the render view which browser window it's being attached to.
 IPC_MESSAGE_ROUTED1(ExtensionMsg_UpdateBrowserWindowId,
                     int /* id of browser window */)