Add UMA metric to track the time elapsed since a WebAPK was last launched

chrome/android/junit/src/org/chromium/chrome/browser/webapps/WebappDataStorageTest.java

Index: chrome/android/junit/src/org/chromium/chrome/browser/webapps/WebappDataStorageTest.java
diff --git a/chrome/android/junit/src/org/chromium/chrome/browser/webapps/WebappDataStorageTest.java b/chrome/android/junit/src/org/chromium/chrome/browser/webapps/WebappDataStorageTest.java
index 757e15ce12d75282e0e6ae61d89e1198ab716cdb..1cafc37ef69c55a52c81dff9729edba3d6abe5e8 100644
--- a/chrome/android/junit/src/org/chromium/chrome/browser/webapps/WebappDataStorageTest.java
+++ b/chrome/android/junit/src/org/chromium/chrome/browser/webapps/WebappDataStorageTest.java
@@ -18,7 +18,6 @@ import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
-
 import org.robolectric.RuntimeEnvironment;
 import org.robolectric.annotation.Config;
 import org.robolectric.shadows.ShadowLooper;
@@ -188,11 +187,11 @@ public class WebappDataStorageTest {
 
         // Opening a data storage doesn't count as a launch.
         WebappDataStorage storage = WebappDataStorage.open("test");
-        assertTrue(!storage.wasLaunchedRecently());
+        assertTrue(!storage.wasUsedRecently());
 
         // When the last used time is updated, then it is a launch.
         storage.updateLastUsedTime();
-        assertTrue(storage.wasLaunchedRecently());
+        assertTrue(storage.wasUsedRecently());
 
         long lastUsedTime = mSharedPreferences.getLong(WebappDataStorage.KEY_LAST_USED,
                 WebappDataStorage.LAST_USED_INVALID);
@@ -204,29 +203,29 @@ public class WebappDataStorageTest {
         mSharedPreferences.edit()
                 .putLong(WebappDataStorage.KEY_LAST_USED, lastUsedTime - TimeUnit.DAYS.toMillis(1L))
                 .apply();
-        assertTrue(storage.wasLaunchedRecently());
+        assertTrue(storage.wasUsedRecently());
 
         // Move the last used time three days in the past.
         mSharedPreferences.edit()
                 .putLong(WebappDataStorage.KEY_LAST_USED, lastUsedTime - TimeUnit.DAYS.toMillis(3L))
                 .apply();
-        assertTrue(storage.wasLaunchedRecently());
+        assertTrue(storage.wasUsedRecently());
 
         // Move the last used time one week in the past.
         mSharedPreferences.edit()
                 .putLong(WebappDataStorage.KEY_LAST_USED, lastUsedTime - TimeUnit.DAYS.toMillis(7L))
                 .apply();
-        assertTrue(storage.wasLaunchedRecently());
+        assertTrue(storage.wasUsedRecently());
 
         // Move the last used time just under ten days in the past.
         mSharedPreferences.edit().putLong(WebappDataStorage.KEY_LAST_USED,
                 lastUsedTime - TimeUnit.DAYS.toMillis(10L) + 1).apply();
-        assertTrue(storage.wasLaunchedRecently());
+        assertTrue(storage.wasUsedRecently());
 
         // Move the last used time to exactly ten days in the past.
         mSharedPreferences.edit().putLong(WebappDataStorage.KEY_LAST_USED,
                 lastUsedTime - TimeUnit.DAYS.toMillis(10L)).apply();
-        assertTrue(!storage.wasLaunchedRecently());
+        assertTrue(!storage.wasUsedRecently());
     }
 
     @Test