[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 eb5eaa25391250900ac039512b36c438743c0f43..c65ad816f073501dda9f5a52851568b049e684f8 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
@@ -58,6 +58,8 @@ 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 OMNIBOX_PLACEHOLDER_GROUP = "omnibox-placeholder-group";
+
     private static ChromePreferenceManager sPrefs;
 
     private final SharedPreferences mSharedPreferences;
@@ -418,6 +420,22 @@ public class ChromePreferenceManager {
         return mSharedPreferences.getBoolean(CONTENT_SUGGESTIONS_SHOWN_KEY, false);
     }
 
+    /**
+     * Set group of omnibox placeholder experiment
+     * @param group group name of omnibox placeholder experiment
+     */
+    public void setOmniboxPlaceholderGroup(String group) {
+        writeString(OMNIBOX_PLACEHOLDER_GROUP, group);
+    }
+
+    /**
+     * Get group of omnibox placeholder experiment
+     * @return String of omnibox placeholder experiment group name, empty string if not set
+     */
+    public String getOmniboxPlaceholderGroup() {
+        return mSharedPreferences.getString(OMNIBOX_PLACEHOLDER_GROUP, "");
+    }
+
     /**
      * Writes the given int value to the named shared preference.
      * @param key The name of the preference to modify.