Add missing (and remove superfluous) 'explicit' from constructors.

webkit/appcache/mock_appcache_storage_unittest.cc

 // Copyright (c) 2012 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 "base/message_loop.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "webkit/appcache/appcache.h"
 #include "webkit/appcache/appcache_group.h"
 #include "webkit/appcache/appcache_response.h"
 #include "webkit/appcache/appcache_storage.h"
 #include "webkit/appcache/mock_appcache_service.h"
 
 namespace appcache {
 
 class MockAppCacheStorageTest : public testing::Test {
  public:
   class MockStorageDelegate : public AppCacheStorage::Delegate {
    public:
-    explicit MockStorageDelegate()
+    MockStorageDelegate()
         : loaded_cache_id_(0), stored_group_success_(false),
           obsoleted_success_(false), found_cache_id_(kNoCacheId) {
     }
 
     void OnCacheLoaded(AppCache* cache, int64 cache_id) {
       loaded_cache_ = cache;
       loaded_cache_id_ = cache_id;
     }
 
     void OnGroupLoaded(AppCacheGroup* group, const GURL& manifest_url) {
@@ skipping 585 matching lines @@
   EXPECT_TRUE(delegate.found_manifest_url_.is_empty());
   EXPECT_EQ(kNoCacheId, delegate.found_cache_id_);
   EXPECT_EQ(kNoResponseId, delegate.found_entry_.response_id());
   EXPECT_EQ(kNoResponseId, delegate.found_fallback_entry_.response_id());
   EXPECT_TRUE(delegate.found_fallback_url_.is_empty());
   EXPECT_EQ(0, delegate.found_entry_.types());
   EXPECT_EQ(0, delegate.found_fallback_entry_.types());
 }
 
 }  // namespace appcache