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

net/spdy/spdy_session_spdy3_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 "net/spdy/spdy_session.h"
 
 #include "net/base/cert_test_util.h"
 #include "net/base/host_cache.h"
 #include "net/base/ip_endpoint.h"
 #include "net/base/net_log_unittest.h"
@@ skipping 10 matching lines @@
 
 namespace {
 
 static int g_delta_seconds = 0;
 base::TimeTicks TheNearFuture() {
   return base::TimeTicks::Now() + base::TimeDelta::FromSeconds(g_delta_seconds);
 }
 
 class ClosingDelegate : public SpdyStream::Delegate {
  public:
-  ClosingDelegate(SpdyStream* stream) : stream_(stream) {}
+  explicit ClosingDelegate(SpdyStream* stream) : stream_(stream) {}
 
   // SpdyStream::Delegate implementation:
   virtual bool OnSendHeadersComplete(int status) OVERRIDE {
     return true;
   }
   virtual int OnSendBody() OVERRIDE {
     return OK;
   }
   virtual int OnSendBodyComplete(int status, bool* eof) OVERRIDE {
     return OK;
@@ skipping 1872 matching lines @@
                                  BoundNetLog()));
 
   EXPECT_EQ(OK, session->InitializeWithSocket(connection.release(), false, OK));
   EXPECT_TRUE(session->VerifyDomainAuthentication("www.example.org"));
   EXPECT_TRUE(session->VerifyDomainAuthentication("mail.example.org"));
   EXPECT_FALSE(session->VerifyDomainAuthentication("mail.example.com"));
   EXPECT_FALSE(session->VerifyDomainAuthentication("mail.google.com"));
 }
 
 }  // namespace net