[Extensions] Implement chrome.runtime.openOptionsPage.

extensions/browser/api/runtime/runtime_api.h

Index: extensions/browser/api/runtime/runtime_api.h
diff --git a/extensions/browser/api/runtime/runtime_api.h b/extensions/browser/api/runtime/runtime_api.h
index e330521985518133218c86bdf3f05577f0db1f2a..901bab4a0a835f5f2808c80763b9baaca5f04d82 100644
--- a/extensions/browser/api/runtime/runtime_api.h
+++ b/extensions/browser/api/runtime/runtime_api.h
@@ -64,6 +64,7 @@ class RuntimeAPI : public BrowserContextKeyedAPI,
   void OpenURL(const GURL& uninstall_url);
   bool GetPlatformInfo(core_api::runtime::PlatformInfo* info);
   bool RestartDevice(std::string* error_message);
+  bool OpenOptionsPage(const Extension* extension);
 
  private:
   friend class BrowserContextKeyedAPIFactory<RuntimeAPI>;
@@ -162,6 +163,15 @@ class RuntimeGetBackgroundPageFunction : public UIThreadExtensionFunction {
   void OnPageLoaded(ExtensionHost*);
 };
 
+class RuntimeOpenOptionsPageFunction : public UIThreadExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("runtime.openOptionsPage", RUNTIME_OPENOPTIONSPAGE)
+
+ protected:
+  ~RuntimeOpenOptionsPageFunction() override {}
+  ResponseAction Run() override;
+};
+
 class RuntimeSetUninstallURLFunction : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("runtime.setUninstallURL", RUNTIME_SETUNINSTALLURL)