Fix mounted checks (#5305)

Fixes in preparation for https://dart-review.googlesource.com/c/sdk/+/330561.

The change referenced above tightens the `use_build_context_synchronously` lint to ensure that `mounted` is checked on the appropriate `BuildContext` or `State`. This change fixes up violations in the flutter/packages repo in preparation of this new enforcement.

Author: goderbauer

packages/webview_flutter/webview_flutter/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 4.4.2
+
+* Fixes `use_build_context_synchronously` lint violations in the example app.
+
 ## 4.4.1
 
 * Exposes `JavaScriptLogLevel` from platform interface.

packages/webview_flutter/webview_flutter/example/lib/main.dart

@@ -217,7 +217,7 @@ Page resource error:
     return FloatingActionButton(
       onPressed: () async {
         final String? url = await _controller.currentUrl();
-        if (context.mounted) {
+        if (mounted) {
           ScaffoldMessenger.of(context).showSnackBar(
             SnackBar(content: Text('Favorited $url')),
           );

packages/webview_flutter/webview_flutter/pubspec.yaml

@@ -2,7 +2,7 @@ name: webview_flutter
 description: A Flutter plugin that provides a WebView widget on Android and iOS.
 repository: https://github.com/flutter/packages/tree/main/packages/webview_flutter/webview_flutter
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+webview%22
-version: 4.4.1
+version: 4.4.2
 
 environment:
   sdk: ">=2.19.0 <4.0.0"

packages/webview_flutter/webview_flutter_android/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 3.12.1
+
+* Fixes `use_build_context_synchronously` lint violations in the example app.
+
 ## 3.12.0
 
 * Adds support for `PlatformWebViewController.getUserAgent`.

packages/webview_flutter/webview_flutter_android/example/lib/main.dart

@@ -210,7 +210,7 @@ Page resource error:
     return FloatingActionButton(
       onPressed: () async {
         final String? url = await _controller.currentUrl();
-        if (context.mounted) {
+        if (mounted) {
           ScaffoldMessenger.of(context).showSnackBar(
             SnackBar(content: Text('Favorited $url')),
           );

packages/webview_flutter/webview_flutter_android/pubspec.yaml

@@ -2,7 +2,7 @@ name: webview_flutter_android
 description: A Flutter plugin that provides a WebView widget on Android.
 repository: https://github.com/flutter/packages/tree/main/packages/webview_flutter/webview_flutter_android
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+webview%22
-version: 3.12.0
+version: 3.12.1
 
 environment:
   sdk: ">=2.19.0 <4.0.0"

packages/webview_flutter/webview_flutter_wkwebview/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 3.9.3
+
+* Fixes `use_build_context_synchronously` lint violations in the example app.
+
 ## 3.9.2
 
 * Fixes error caused by calling `WKWebViewConfiguration.limitsNavigationsToAppBoundDomains` on

packages/webview_flutter/webview_flutter_wkwebview/example/lib/main.dart

@@ -211,7 +211,7 @@ Page resource error:
     return FloatingActionButton(
       onPressed: () async {
         final String? url = await _controller.currentUrl();
-        if (context.mounted) {
+        if (mounted) {
           ScaffoldMessenger.of(context).showSnackBar(
             SnackBar(content: Text('Favorited $url')),
           );

packages/webview_flutter/webview_flutter_wkwebview/pubspec.yaml

@@ -2,7 +2,7 @@ name: webview_flutter_wkwebview
 description: A Flutter plugin that provides a WebView widget based on Apple's WKWebView control.
 repository: https://github.com/flutter/packages/tree/main/packages/webview_flutter/webview_flutter_wkwebview
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+webview%22
-version: 3.9.2
+version: 3.9.3
 
 environment:
   sdk: ">=2.19.0 <4.0.0"