Cleanup: Correctly spell success(ful).

ios/web/crw_browsing_data_store_unittest.mm

Index: ios/web/crw_browsing_data_store_unittest.mm
diff --git a/ios/web/crw_browsing_data_store_unittest.mm b/ios/web/crw_browsing_data_store_unittest.mm
index 8db9898a0fed74ef757c1dfef658ad867cbc58dd..f00421d279d6f0423fb8d25f1bec2f416b947403 100644
--- a/ios/web/crw_browsing_data_store_unittest.mm
+++ b/ios/web/crw_browsing_data_store_unittest.mm
@@ -153,7 +153,7 @@ TEST_F(BrowsingDataStoreTest, MakeActiveAndInactiveOperations) {
   EXPECT_EQ(0U, [observer modeChangeCount]);
 
   __block int callbacks_received_count = 0;
-  void (^unsucessfullCallback)(BOOL) = ^(BOOL success) {
+  void (^unsuccessfullCallback)(BOOL) = ^(BOOL success) {
     ASSERT_TRUE([NSThread isMainThread]);
     ++callbacks_received_count;
     BrowsingDataStoreMode mode = [browsing_data_store_ mode];
@@ -163,20 +163,20 @@ TEST_F(BrowsingDataStoreTest, MakeActiveAndInactiveOperations) {
 
   [browsing_data_store_ makeActiveWithCompletionHandler:^(BOOL success) {
     EXPECT_EQ(0, callbacks_received_count);
-    unsucessfullCallback(success);
+    unsuccessfullCallback(success);
   }];
   EXPECT_EQ(CHANGING, [browsing_data_store_ mode]);
   EXPECT_EQ(1U, [observer modeChangeCount]);
 
   [browsing_data_store_ makeInactiveWithCompletionHandler:^(BOOL success) {
     EXPECT_EQ(1, callbacks_received_count);
-    unsucessfullCallback(success);
+    unsuccessfullCallback(success);
   }];
   EXPECT_EQ(CHANGING, [browsing_data_store_ mode]);
 
   [browsing_data_store_ makeActiveWithCompletionHandler:^(BOOL success) {
     EXPECT_EQ(2, callbacks_received_count);
-    unsucessfullCallback(success);
+    unsuccessfullCallback(success);
   }];
   EXPECT_EQ(CHANGING, [browsing_data_store_ mode]);