fix timeouts

Author: bparrishMines

packages/webview_flutter/webview_flutter_android/example/integration_test/webview_flutter_test.dart

@@ -144,12 +144,6 @@ Future<void> main() async {
         PlatformNavigationDelegate(
           const PlatformNavigationDelegateCreationParams(),
         )..setOnPageFinished((String url) => pageLoads.add(url)),
-      )
-      ..loadRequest(
-        LoadRequestParams(
-          uri: Uri.parse(headersUrl),
-          headers: headers,
-        ),
       );
 
     await tester.pumpWidget(
@@ -162,6 +156,10 @@ Future<void> main() async {
       ),
     );
 
+    controller.loadRequest(
+      LoadRequestParams(uri: Uri.parse(headersUrl), headers: headers),
+    );
+
     await pageLoads.stream.firstWhere((String url) => url == headersUrl);
 
     final String content = await controller.runJavaScriptReturningResult(
@@ -699,9 +697,6 @@ Future<void> main() async {
                   ? NavigationDecision.prevent
                   : NavigationDecision.navigate;
             }),
-        )
-        ..loadRequest(
-          LoadRequestParams(uri: Uri.parse(blankPageEncoded)),
         );
 
       await tester.pumpWidget(Builder(
@@ -712,6 +707,10 @@ Future<void> main() async {
         },
       ));
 
+      controller.loadRequest(
+        LoadRequestParams(uri: Uri.parse(blankPageEncoded)),
+      );
+
       await pageLoads.stream.first; // Wait for initial page load.
       await controller.runJavaScript('location.href = "$secondaryUrl"');
 
@@ -816,8 +815,7 @@ Future<void> main() async {
                   ? NavigationDecision.prevent
                   : NavigationDecision.navigate;
             }),
-        )
-        ..loadRequest(LoadRequestParams(uri: Uri.parse(blankPageEncoded)));
+        );
 
       await tester.pumpWidget(Builder(
         builder: (BuildContext context) {
@@ -827,6 +825,10 @@ Future<void> main() async {
         },
       ));
 
+      controller.loadRequest(
+        LoadRequestParams(uri: Uri.parse(blankPageEncoded)),
+      );
+
       await pageLoads.stream.first; // Wait for initial page load.
       await controller
           .runJavaScript('location.href = "https://www.youtube.com/"');
@@ -861,8 +863,7 @@ Future<void> main() async {
                   () => NavigationDecision.navigate);
               return decision;
             }),
-        )
-        ..loadRequest(LoadRequestParams(uri: Uri.parse(blankPageEncoded)));
+        );
 
       await tester.pumpWidget(Builder(
         builder: (BuildContext context) {
@@ -872,6 +873,10 @@ Future<void> main() async {
         },
       ));
 
+      controller.loadRequest(LoadRequestParams(
+        uri: Uri.parse(blankPageEncoded),
+      ));
+
       await pageLoads.stream.first; // Wait for initial page load.
       await controller.runJavaScript('location.href = "$secondaryUrl"');