Issue 4399 - Add WebView inheritor with ad blocking

libadblockplus-android-webview/assets/hide.js

+{
+  {{DEBUG}} console.log('started hiding elements');
+  var selectors = JSON.parse({{BRIDGE}}.getElemhideSelectors());
+  {{DEBUG}} console.log('parsed selectors: ' + selectors.length);
+  for (var i = 0; i < selectors.length; i++)
+  {
+    var selector = selectors[i];
+    if (selector[0] == '#')
+    {
+      var element = document.getElementById(selector.substr(1));
+      if (element != undefined)
+      {
+        {{DEBUG}} console.log('elem blocked ' + selector);
+        element.style.display = 'none';
+      };
+    }
+    else
+    {
+      var elements = document.getElementsByClassName(selector.substr(1));
+      for (var k=0; k < elements.length; k++)
+      {
+         {{DEBUG}} console.log('elem hidden ' + selector);
+         elements[k].style.display = 'none';
+      }
+    };
+  };
+  {{DEBUG}} console.log('finished hiding elements');
+};