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

webkit/blob/blob_url_request_job_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/bind.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 97 matching lines @@
     }
 
     scoped_refptr<net::IOBuffer> received_data_;
     std::string response_data_;
   };
 
   // A simple ProtocolHandler implementation to create BlobURLRequestJob.
   class MockProtocolHandler :
       public net::URLRequestJobFactory::ProtocolHandler {
    public:
-    MockProtocolHandler(BlobURLRequestJobTest* test) : test_(test) {}
+    explicit MockProtocolHandler(BlobURLRequestJobTest* test) : test_(test) {}
 
     // net::URLRequestJobFactory::ProtocolHandler override.
     virtual net::URLRequestJob* MaybeCreateJob(
         net::URLRequest* request,
         net::NetworkDelegate* network_delegate) const OVERRIDE {
       return new BlobURLRequestJob(request,
                                    network_delegate,
                                    test_->blob_data_,
                                    test_->file_system_context_,
                                    base::MessageLoopProxy::current());
@@ skipping 316 matching lines @@
   EXPECT_TRUE(request_->response_headers()->GetMimeType(&content_type));
   EXPECT_EQ(kTestContentType, content_type);
   void* iter = NULL;
   std::string content_disposition;
   EXPECT_TRUE(request_->response_headers()->EnumerateHeader(
       &iter, "Content-Disposition", &content_disposition));
   EXPECT_EQ(kTestContentDisposition, content_disposition);
 }
 
 }  // namespace webkit_blob