Modified EditorWebView to use WebView.evaluateJavascript on API>=19

Author: aforcier

WordPressEditor/src/main/java/org/wordpress/android/editor/EditorWebView.java

@@ -1,6 +1,7 @@
 package org.wordpress.android.editor;
 
 import android.content.Context;
+import android.os.Build;
 import android.util.AttributeSet;
 
 public class EditorWebView extends EditorWebViewAbstract {
@@ -10,7 +11,11 @@ public EditorWebView(Context context, AttributeSet attrs) {
     }
 
     public void execJavaScriptFromString(String javaScript) {
-        this.loadUrl("javascript:" + javaScript);
+        if (Build.VERSION.SDK_INT >= 19) {
+            this.evaluateJavascript(javaScript, null);
+        } else {
+            this.loadUrl("javascript:" + javaScript);
+        }
     }
 
 }