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

remoting/codec/codec_test.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 <deque>
 #include <stdlib.h>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 263 matching lines @@
   scoped_array<uint8> image_data_;
   scoped_refptr<CaptureData> capture_data_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoDecoderTester);
 };
 
 // The VideoEncoderTester provides a hook for retrieving the data, and passing
 // the message to other subprograms for validaton.
 class VideoEncoderTester {
  public:
-  VideoEncoderTester(VideoEncoderMessageTester* message_tester)
+  explicit VideoEncoderTester(VideoEncoderMessageTester* message_tester)
       : message_tester_(message_tester),
         decoder_tester_(NULL),
         data_available_(0) {
   }
 
   ~VideoEncoderTester() {
     EXPECT_GT(data_available_, 0);
   }
 
   void DataAvailable(scoped_ptr<VideoPacket> packet) {
@@ skipping 182 matching lines @@
   // Check that the decoder correctly re-renders the frame if its client
   // invalidates the frame.
   decoder_tester.ResetRenderedData();
   decoder->Invalidate(view_size, SkRegion(view_rect));
   decoder_tester.RenderFrame();
   decoder_tester.VerifyResultsApprox(expected_view_data.get(),
                                      max_error_limit, mean_error_limit);
 }
 
 }  // namespace remoting