WebView: add @Nullable and @NonNull annotations

This adds @Nullable and @NonNull annotations where the docs previously
stated this. This change should be safe, since we already disallowed
null values for the @NonNull parameters via documentation.

I verified that documentation changes for APIs which previously did not
mention null-ness in @param or @return Javadocs (if the API already
mentioned it in these spots, then DroidDoc prefers the hand-written
description).

This also fixes various lint errors.

Bug: 65465498
Test: make update-api and manually verify docs
Change-Id: I4751508d0e72be8ddfc3d6b601db8c307c9df60e

1 files changed, 6 insertions, 3 deletions

diff --git a/core/java/android/webkit/FindActionModeCallback.java b/core/java/android/webkit/FindActionModeCallback.java
index 71f85d70e30d..6a8c256f0ae2 100644
--- a/core/java/android/webkit/FindActionModeCallback.java
+++ b/core/java/android/webkit/FindActionModeCallback.java
@@ -16,6 +16,7 @@
 
 package android.webkit;
 
+import android.annotation.NonNull;
 import android.annotation.SystemApi;
 import android.content.Context;
 import android.content.res.Resources;
@@ -87,10 +88,12 @@ public class FindActionModeCallback implements ActionMode.Callback, TextWatcher,
         mMatchesFound = false;
     }
 
-    /*
-     * Set the WebView to search.  Must be non null.
+    /**
+     * Set the WebView to search.
+     *
+     * @param webView an implementation of WebView
      */
-    public void setWebView(WebView webView) {
+    public void setWebView(@NonNull WebView webView) {
         if (null == webView) {
             throw new AssertionError("WebView supplied to "
                     + "FindActionModeCallback cannot be null");