[Android] Omnibox Placeholder Experiment

chrome/android/java/src/org/chromium/chrome/browser/preferences/ChromePreferenceManager.java

Index: chrome/android/java/src/org/chromium/chrome/browser/preferences/ChromePreferenceManager.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/preferences/ChromePreferenceManager.java b/chrome/android/java/src/org/chromium/chrome/browser/preferences/ChromePreferenceManager.java
index 609ff7ce17277bfd18739db7ec7215c22f68a46d..4518aa5f2c029c78bdef0d5b55da2a8a3cc8ecaa 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/preferences/ChromePreferenceManager.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/preferences/ChromePreferenceManager.java
@@ -56,6 +56,8 @@ public class ChromePreferenceManager {
     private static final String SUCCESS_UPLOAD_SUFFIX = "_crash_success_upload";
     private static final String FAILURE_UPLOAD_SUFFIX = "_crash_failure_upload";
 
+    private static final String URL_BAR_HINT_KEY = "url_bar_hint";
+
     private static ChromePreferenceManager sPrefs;
 
     private final SharedPreferences mSharedPreferences;
@@ -417,6 +419,22 @@ public class ChromePreferenceManager {
     }
 
     /**
+     * Set hint text to show on url bar
+     * @param hint Hint text to show on url bar
+     */
+    public void setUrlBarHint(String hint) {

[mdjones, 2017/05/26 16:14:34]

Same as above; is this caching the hint or the experiment switch? Also UrlBar ->
Omnibox.

[huayinz, 2017/05/26 17:21:36]

See above^

+        writeString(URL_BAR_HINT_KEY, hint);
+    }
+
+    /**
+     * Get hint text to show on url bar
+     * @return String of hint text to show on url bar, null if not set
+     */
+    public String getUrlBarHint() {
+        return mSharedPreferences.getString(URL_BAR_HINT_KEY, null);
+    }
+
+    /**
      * Writes the given int value to the named shared preference.
      * @param key The name of the preference to modify.
      * @param value The new value for the preference.