[Extensions] Implement chrome.runtime.openOptionsPage.

extensions/browser/api/runtime/runtime_api_delegate.h

Index: extensions/browser/api/runtime/runtime_api_delegate.h
diff --git a/extensions/browser/api/runtime/runtime_api_delegate.h b/extensions/browser/api/runtime/runtime_api_delegate.h
index 98b49639bc80334cd2e5bc9d9f452bd6d96464d3..a704c2fae9a2c585e53012aa4589b85b29bf7b60 100644
--- a/extensions/browser/api/runtime/runtime_api_delegate.h
+++ b/extensions/browser/api/runtime/runtime_api_delegate.h
@@ -70,6 +70,11 @@ class RuntimeAPIDelegate {
   // Request a restart of the host device. Returns false iff the device
   // will not be restarted.
   virtual bool RestartDevice(std::string* error_message) = 0;
+
+  // Open |extension|'s options page, if it has one. Returns true if an
+  // options page was opened, false otherwise. See the docs of the
+  // chrome.runtime.openOptionsPage function for the gritty details.
+  virtual bool OpenOptionsPage(const Extension* extension);
 };
 
 }  // namespace extensions