Replace string::find(prefix) == 0 pattern with base::StartsWith().

components/sync_sessions/favicon_cache_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/sync_sessions/favicon_cache.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_number_conversions.h"
+#include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/time/time.h"
 #include "sync/api/attachments/attachment_id.h"
 #include "sync/api/sync_change_processor_wrapper_for_test.h"
 #include "sync/api/sync_error_factory_mock.h"
 #include "sync/api/time.h"
 #include "sync/internal_api/public/attachments/attachment_service_proxy_for_test.h"
 #include "sync/protocol/favicon_image_specifics.pb.h"
 #include "sync/protocol/favicon_tracking_specifics.pb.h"
 #include "sync/protocol/sync.pb.h"
@@ skipping 213 matching lines @@
   }
   return testing::AssertionSuccess();
 }
 
 // Helper to extract the favicon id embedded in the tag of a sync
 // change.
 int GetFaviconId(const syncer::SyncChange change) {
   std::string tag = syncer::SyncDataLocal(change.sync_data()).GetTag();
   const std::string kPrefix = "http://bla.com/";
   const std::string kSuffix = ".ico";
-  if (tag.find(kPrefix) != 0)
+  if (!base::StartsWith(tag, kPrefix, base::CompareCase::SENSITIVE))
     return -1;
   std::string temp = tag.substr(kPrefix.length());
   if (temp.rfind(kSuffix) <= 0)
     return -1;
   temp = temp.substr(0, temp.rfind(kSuffix));
   int result = -1;
   if (!base::StringToInt(temp, &result))
     return -1;
   return result;
 }
@@ skipping 1669 matching lines @@
   EXPECT_EQ(changes[4].change_type(), syncer::SyncChange::ACTION_ADD);
   EXPECT_EQ(changes[4].sync_data().GetDataType(), syncer::FAVICON_TRACKING);
   EXPECT_EQ(kMaxSyncFavicons, GetFaviconId(changes[4]));
   // Expire tracking for favicon[0].
   EXPECT_EQ(changes[5].change_type(), syncer::SyncChange::ACTION_DELETE);
   EXPECT_EQ(changes[5].sync_data().GetDataType(), syncer::FAVICON_TRACKING);
   EXPECT_EQ(0, GetFaviconId(changes[5]));
 }
 
 }  // namespace browser_sync