Record UMA for snackbars shown for all purposes

chrome/android/java/src/org/chromium/chrome/browser/offlinepages/OfflinePageUtils.java

Index: chrome/android/java/src/org/chromium/chrome/browser/offlinepages/OfflinePageUtils.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/OfflinePageUtils.java b/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/OfflinePageUtils.java
index 0e9c488bc08c31c632d84e02e0fc3ac317d6c66f..2e05eb492ba94bd22784c8e3e03e43dcefd9cb2f 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/OfflinePageUtils.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/OfflinePageUtils.java
@@ -166,7 +166,8 @@ public class OfflinePageUtils {
                 Snackbar.make(context.getString(R.string.offline_pages_viewing_offline_page),
                                 snackbarController, Snackbar.TYPE_ACTION)
                         .setSingleLine(false)
-                        .setAction(context.getString(R.string.reload), tabId);
+                        .setAction(context.getString(R.string.reload), tabId)
+                        .setPurpose(Snackbar.UMA_OFFLINE_PAGE_RELOAD);
         snackbar.setDuration(SNACKBAR_DURATION);
         snackbarManager.showSnackbar(snackbar);
     }
@@ -239,7 +240,7 @@ public class OfflinePageUtils {
         int scale = batteryStatus.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
         if (scale == 0) return 0;
 
-        int percentage = (int) Math.round(100 * level / (float) scale);
+        int percentage = Math.round(100 * level / (float) scale);
         Log.d(TAG, "Battery Percentage is " + percentage);
         return percentage;
     }