Post-process Currency conversion answer text.

This change ensures that currency conversion answers are shortened to
offer just final result, eg. instead of:

   1,000 United State Dollar = 1,330.75 Canadian Dollar
   1000 usd to cad

this will show:

   1,330.75 Canadian Dollar
   1000 usd to cad

Bug: 936730
Change-Id: I1222c5fba17e6cca07947e37bc2494f89abec98e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1500915
Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: Ender <ender@google.com>
Cr-Commit-Position: refs/heads/master@{#637855}

chrome/android/java/src/org/chromium/chrome/browser/omnibox/suggestions/answer/AnswerText.java

@@ -93,6 +93,10 @@ protected void build(SuggestionAnswer.ImageLine line) {
      */
     @SuppressWarnings("deprecation") // Update usage of Html.fromHtml when API min is 24
     protected void appendAndStyleText(String text, MetricAffectingSpan[] styles) {
+        // Unescape HTML entities (e.g. """, ">").
+        text = Html.fromHtml(text).toString();
+        text = processAnswerText(text);
+
         // Determine the maximum height of the TextAppearanceSpans that are applied for this field.
         for (MetricAffectingSpan style : styles) {
             if (!(style instanceof TextAppearanceSpan)) continue;
@@ -101,12 +105,9 @@ protected void appendAndStyleText(String text, MetricAffectingSpan[] styles) {
             if (mHeightSp < textHeightSp) mHeightSp = textHeightSp;
         }
 
-        // Unescape HTML entities (e.g. "&quot;", "&gt;").
-        text = Html.fromHtml(text).toString();
-
         // Append as HTML (answer responses contain simple markup).
         int start = mText.length();
-        mText.append(Html.fromHtml(text));
+        mText.append(text);
         int end = mText.length();
 
         for (MetricAffectingSpan style : styles) {
@@ -121,4 +122,14 @@ protected void appendAndStyleText(String text, MetricAffectingSpan[] styles) {
      * @return TextAppearanceSpan array specifying styles to be used to present text field.
      */
     protected abstract MetricAffectingSpan[] getAppearanceForText(@AnswerTextType int type);
+
+    /**
+     * Process (if desired) content of the answer text.
+     *
+     * @param text Source text.
+     * @return Either original or modified text.
+     */
+    protected String processAnswerText(String text) {
+        return text;
+    }
 }

chrome/android/java/src/org/chromium/chrome/browser/omnibox/suggestions/answer/AnswerTextNewLayout.java

@@ -90,6 +90,27 @@ static AnswerText[] from(Context context, OmniboxSuggestion suggestion, String q
         appendAndStyleText(text, getAppearanceForText(AnswerTextType.SUGGESTION));
     }
 
+    /**
+     * Process (if desired) content of the answer text.
+     *
+     * @param text Source text.
+     * @return Either original or modified text.
+     */
+    @Override
+    protected String processAnswerText(String text) {
+        if (mIsAnswer && mAnswerType == AnswerType.CURRENCY) {
+            // Modify the content of answer to present only the value after conversion, that is:
+            //    1,000 United State Dollar = 1,330.75 Canadian Dollar
+            // becomes
+            //    1,330.75 Canadian Dollar
+            int offset = text.indexOf(" = ");
+            if (offset > 0) {
+                text = text.substring(offset + 3);
+            }
+        }
+        return text;
+    }
+
     /**
      * Return the TextAppearanceSpan array specifying text decorations for a given field type.
      *