Fix formatting specifier for MSVC++ 2013 compatibility.

media/cast/sender/external_video_encoder.cc

 // Copyright 2014 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 "media/cast/sender/external_video_encoder.h"
 
 #include <cmath>
 
 #include "base/bind.h"
 #include "base/debug/crash_logging.h"
@@ skipping 300 matching lines @@
         quantizer_estimator_.Reset();
       }
 
       // TODO(miu): Determine when/why encoding can produce zero-length data,
       // which causes crypto crashes.  http://crbug.com/519022
       if (!has_seen_zero_length_encoded_frame_ && encoded_frame->data.empty()) {
         has_seen_zero_length_encoded_frame_ = true;
 
         const char kZeroEncodeDetails[] = "zero-encode-details";
         const std::string details = base::StringPrintf(
-            "%c/%c,id=%" PRIu32 ",rtp=%" PRIu32 ",br=%d,q=%zu,act=%c,ref=%d",
+            ("%c/%c,id=%" PRIu32 ",rtp=%" PRIu32 ",br=%d,q=%" PRIuS
+             ",act=%c,ref=%d"),
             codec_profile_ == media::VP8PROFILE_ANY ? 'V' : 'H',
             key_frame ? 'K' : 'D', encoded_frame->frame_id,
             encoded_frame->rtp_timestamp, request.target_bit_rate / 1000,
             in_progress_frame_encodes_.size(), encoder_active_ ? 'Y' : 'N',
             static_cast<int>(encoded_frame->referenced_frame_id % 1000));
         base::debug::SetCrashKeyValue(kZeroEncodeDetails, details);
         // Please forward crash reports to http://crbug.com/519022:
         base::debug::DumpWithoutCrashing();
         base::debug::ClearCrashKey(kZeroEncodeDetails);
       }
@@ skipping 464 matching lines @@
   const double kEntropyAtMaxQuantizer = 7.5;
   const double slope =
       (MAX_VP8_QUANTIZER - MIN_VP8_QUANTIZER) / kEntropyAtMaxQuantizer;
   const double quantizer = std::min<double>(
       MAX_VP8_QUANTIZER, MIN_VP8_QUANTIZER + slope * shannon_entropy);
   return quantizer;
 }
 
 }  //  namespace cast
 }  //  namespace media