[Responsiveness] Add API to manually check WebProcess responsiveness

Author: magomez

Source/WebKit/UIProcess/API/glib/WebKitWebView.cpp

@@ -5645,3 +5645,24 @@ webkit_web_view_get_default_content_security_policy(WebKitWebView* webView)
 
     return webView->priv->defaultContentSecurityPolicy.data();
 }
+
+void webkit_web_view_is_web_process_responsive_async(WebKitWebView *webView, GCancellable* cancellable, GAsyncReadyCallback callback, gpointer userData)
+{
+    g_return_if_fail(WEBKIT_IS_WEB_VIEW(webView));
+
+    GRefPtr<GTask> task = adoptGRef(g_task_new(webView, cancellable, callback, userData));
+    getPage(webView).isWebProcessResponsive([task = WTFMove(task)] (bool isWebProcessResponsive) {
+        if (g_task_return_error_if_cancelled(task.get()))
+            return;
+
+        g_task_return_boolean(task.get(), isWebProcessResponsive);
+    });
+}
+
+gboolean webkit_web_view_is_web_process_responsive_finish(WebKitWebView* webView, GAsyncResult* result, GError** error)
+{
+    g_return_val_if_fail(WEBKIT_IS_WEB_VIEW(webView), false);
+    g_return_val_if_fail(g_task_is_valid(result, webView), false);
+
+    return g_task_propagate_boolean(G_TASK(result), error);
+}

Source/WebKit/UIProcess/API/glib/WebKitWebView.h.in

@@ -1047,6 +1047,17 @@ webkit_web_view_get_default_content_security_policy  (WebKitWebView
  */
 #endif
 
+WEBKIT_API void
+webkit_web_view_is_web_process_responsive_async      (WebKitWebView             *web_view,
+                                                      GCancellable              *cancellable,
+                                                      GAsyncReadyCallback       callback,
+                                                      gpointer                  user_data);
+
+WEBKIT_API gboolean
+webkit_web_view_is_web_process_responsive_finish     (WebKitWebView             *web_view,
+                                                      GAsyncResult              *result,
+                                                      GError                    **error);
+
 G_END_DECLS
 
 #endif

Source/WebKit/UIProcess/WebPageProxy.cpp

@@ -9636,6 +9636,21 @@ void WebPageProxy::didChangeProcessIsResponsive()
     internals().pageLoadState.didChangeProcessIsResponsive();
 }
 
+void WebPageProxy::isWebProcessResponsive(CompletionHandler<void (bool)>&& callback)
+{
+    if (m_isClosed) {
+        if (callback) {
+            RunLoop::main().dispatch([callback = WTFMove(callback)]() mutable {
+                bool isWebProcessResponsive = true;
+                callback(isWebProcessResponsive);
+            });
+        }
+        return;
+    }
+
+    process().isResponsive(WTFMove(callback));
+}
+
 String WebPageProxy::currentURL() const
 {
     String url = internals().pageLoadState.activeURL();

Source/WebKit/UIProcess/WebPageProxy.h

@@ -1492,6 +1492,7 @@ class WebPageProxy final : public API::ObjectImpl<API::Object::Type::Page>, publ
     void dispatchProcessDidTerminate(ProcessTerminationReason);
     void willChangeProcessIsResponsive();
     void didChangeProcessIsResponsive();
+    void isWebProcessResponsive(CompletionHandler<void (bool isWebProcessResponsive)>&& callback);
 
 #if PLATFORM(IOS_FAMILY)
     void processWillBecomeSuspended();