[ContextualSearch] Adds long press promo for Contextual Search.

chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchFieldTrial.java

Index: chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchFieldTrial.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchFieldTrial.java b/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchFieldTrial.java
index 0a3c3e46739179557628df28e1fdd0fcbad850b5..0ebd02b6f6cc81bc17cf31c60fd5e518585e5d06 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchFieldTrial.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchFieldTrial.java
@@ -12,7 +12,10 @@ import org.chromium.chrome.browser.ChromeSwitches;
 import org.chromium.chrome.browser.ChromeVersionInfo;
 import org.chromium.components.variations.VariationsAssociatedData;
 
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
 import java.util.Arrays;
+import java.util.Date;
 import java.util.Locale;
 
 /**
@@ -37,6 +40,12 @@ public class ContextualSearchFieldTrial {
     static final String TAP_RESOLVE_LIMIT_FOR_UNDECIDED = "tap_resolve_limit_for_undecided";
     static final String TAP_PREFETCH_LIMIT_FOR_UNDECIDED = "tap_prefetch_limit_for_undecided";
 
+    static final String PEEK_PROMO_ENABLED = "peek_promo_enabled";
+    static final String PEEK_PROMO_MAX_SHOW_COUNT = "peek_promo_max_show_count";
+    static final String PEEK_PROMO_EXPIRATION_DATE = "peek_promo_expiration_date";
+    private static final String PEEK_PROMO_EXPIRATION_DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";
+    static final int PEEK_PROMO_DEFAULT_MAX_SHOW_COUNT = 10;
+
     private static final String CHINESE_LANGUAGE_CODE = "zh";
     private static final String JAPANESE_LANGUAGE_CODE = "ja";
     private static final String KOREAN_LANGUAGE_CODE = "ko";
@@ -56,6 +65,11 @@ public class ContextualSearchFieldTrial {
     // Cached value to avoid repeated and redundant JNI operations.
     private static Boolean sEnabled;
 
+    private static Boolean sIsPeekPromoEnabled;
+    private static int sPeekPromoMaxCount;
+    private static Date sPeekPromoExpirationDate;
+    private static boolean sPeekPromoExpirationDateCached;
+
     /**
      * Don't instantiate.
      */
@@ -227,6 +241,53 @@ public class ContextualSearchFieldTrial {
                 DEFAULT_TAP_PREFETCH_LIMIT_FOR_UNDECIDED);
     }
 
+    /**
+     * @return Whether the Peek Promo is enabled.
+     */
+    static boolean isPeekPromoEnabled() {
+        if (sIsPeekPromoEnabled != null) return sIsPeekPromoEnabled;
+
+        sIsPeekPromoEnabled = getBooleanParam(PEEK_PROMO_ENABLED);
+        return sIsPeekPromoEnabled;
+    }
+
+    /**
+     * @return The maximum number of times the Peek Promo should be displayed.
+     */
+    static int getPeekPromoMaxShowCount() {
+        if (sPeekPromoMaxCount > 0) return sPeekPromoMaxCount;
+
+        sPeekPromoMaxCount = getIntParamValueOrDefault(
+                PEEK_PROMO_MAX_SHOW_COUNT,
+                PEEK_PROMO_DEFAULT_MAX_SHOW_COUNT);
+
+        return sPeekPromoMaxCount;
+    }
+
+    /**
+     * @return The expiration date of the Peek Promo, using the format
+     */
+    static Date getPeekPromoExpirationDate() {
+        if (sPeekPromoExpirationDateCached) return sPeekPromoExpirationDate;
+
+        Date expirationDate = null;
+
+        String expirationDateString = getStringParam(PEEK_PROMO_EXPIRATION_DATE);
+        if (expirationDateString != null) {
+            SimpleDateFormat format =
+                    new SimpleDateFormat(PEEK_PROMO_EXPIRATION_DATE_FORMAT, Locale.US);
+            try {
+                expirationDate = format.parse(expirationDateString);
+            } catch (ParseException e) {
+                e.printStackTrace();
+            }
+        }
+
+        sPeekPromoExpirationDateCached = true;
+        sPeekPromoExpirationDate = expirationDate;
+        return sPeekPromoExpirationDate;
+    }
+
     // --------------------------------------------------------------------------------------------
     // Helpers.
     // --------------------------------------------------------------------------------------------
@@ -268,4 +329,16 @@ public class ContextualSearchFieldTrial {
 
         return defaultValue;
     }
+
+    /**
+     * Returns a string value for a Finch parameter. Also checks for a command-line switch.
+     * @param paramName The name of the Finch parameter (or command-line switch) to get a value for.
+     * @return The command-line value, if present, or the finch parameter value.
+     */
+    private static String getStringParam(String paramName) {
+        if (CommandLine.getInstance().hasSwitch(paramName)) {
+            return CommandLine.getInstance().getSwitchValue(paramName);
+        }
+        return VariationsAssociatedData.getVariationParamValue(FIELD_TRIAL_NAME, paramName);
+    }
 }