Revert change to leak canary version, add todo for bug

app/build.gradle

@@ -86,8 +86,8 @@ dependencies {
     compile(project(':libnetcipher'))
 
     // memory leak analysis
-    debugCompile 'com.squareup.leakcanary:leakcanary-android:1.3.1'
+    debugCompile 'com.squareup.leakcanary:leakcanary-android:1.4-beta1'
-    releaseCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1.3.1'
+    releaseCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1.4-beta1'
 
     provided 'javax.annotation:jsr250-api:1.0'
 

app/src/main/java/acr/browser/lightning/view/LightningView.java

@@ -762,6 +762,8 @@ public class LightningView {
      * the WebView cannot be recreated using the public
      * api.
      */
+    // TODO fix bug where WebView.destroy is being called before the tab
+    // is removed
     public synchronized void onDestroy() {
         if (mWebView != null) {
             mWebView.stopLoading();