Revert "WebView JavasScript channels Android implementation. (flutter#1130)"

This reverts commit ad0c63e.

Author: andreidiaconu

packages/webview_flutter/android/src/main/java/io/flutter/plugins/webviewflutter/FlutterWebView.java

@@ -9,31 +9,22 @@
 import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
 import io.flutter.plugin.common.MethodChannel.Result;
 import io.flutter.plugin.platform.PlatformView;
-import java.util.List;
 import java.util.Map;
 
 public class FlutterWebView implements PlatformView, MethodCallHandler {
-  private static final String JS_CHANNEL_NAMES_FIELD = "javascriptChannelNames";
   private final WebView webView;
   private final MethodChannel methodChannel;
 
   @SuppressWarnings("unchecked")
   FlutterWebView(Context context, BinaryMessenger messenger, int id, Map<String, Object> params) {
     webView = new WebView(context);
-
-    methodChannel = new MethodChannel(messenger, "plugins.flutter.io/webview_" + id);
-    methodChannel.setMethodCallHandler(this);
-
-    applySettings((Map<String, Object>) params.get("settings"));
-
-    if (params.containsKey(JS_CHANNEL_NAMES_FIELD)) {
-      registerJavaScriptChannelNames((List<String>) params.get(JS_CHANNEL_NAMES_FIELD));
-    }
-
     if (params.containsKey("initialUrl")) {
       String url = (String) params.get("initialUrl");
       webView.loadUrl(url);
     }
+    applySettings((Map<String, Object>) params.get("settings"));
+    methodChannel = new MethodChannel(messenger, "plugins.flutter.io/webview_" + id);
+    methodChannel.setMethodCallHandler(this);
   }
 
   @Override
@@ -71,12 +62,6 @@ public void onMethodCall(MethodCall methodCall, Result result) {
       case "evaluateJavascript":
         evaluateJavaScript(methodCall, result);
         break;
-      case "addJavascriptChannels":
-        addJavaScriptChannels(methodCall, result);
-        break;
-      case "removeJavascriptChannels":
-        removeJavaScriptChannels(methodCall, result);
-        break;
       default:
         result.notImplemented();
     }
@@ -140,22 +125,6 @@ public void onReceiveValue(String value) {
         });
   }
 
-  @SuppressWarnings("unchecked")
-  private void addJavaScriptChannels(MethodCall methodCall, Result result) {
-    List<String> channelNames = (List<String>) methodCall.arguments;
-    registerJavaScriptChannelNames(channelNames);
-    result.success(null);
-  }
-
-  @SuppressWarnings("unchecked")
-  private void removeJavaScriptChannels(MethodCall methodCall, Result result) {
-    List<String> channelNames = (List<String>) methodCall.arguments;
-    for (String channelName : channelNames) {
-      webView.removeJavascriptInterface(channelName);
-    }
-    result.success(null);
-  }
-
   private void applySettings(Map<String, Object> settings) {
     for (String key : settings.keySet()) {
       switch (key) {
@@ -181,13 +150,6 @@ private void updateJsMode(int mode) {
     }
   }
 
-  private void registerJavaScriptChannelNames(List<String> channelNames) {
-    for (String channelName : channelNames) {
-      webView.addJavascriptInterface(
-          new JavaScriptChannel(methodChannel, channelName), channelName);
-    }
-  }
-
   @Override
   public void dispose() {}
 }