Fix IPC fuzzer build.

tools/ipc_fuzzer/mutate/generate.cc

 // Copyright 2013 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 <stdlib.h>
 
 #include <algorithm>
 #include <iostream>
 #include <ostream>
 #include <set>
@@ skipping 805 matching lines @@
     generator->GenerateBytes(p->name, sizeof(p->name));
     return true;
   }
 };
 
 template <>
 struct GenerateTraits<media::AudioParameters> {
   static bool Generate(media::AudioParameters *p, Generator* generator) {
     int format;
     int channel_layout;
-    int channels;
-    int input_channels;
     int sample_rate;
     int bits_per_sample;
     int frames_per_buffer;
+    int channels;
     int effects;
     if (!GenerateParam(&format, generator))
       return false;
     if (!GenerateParam(&channel_layout, generator))
       return false;
-    if (!GenerateParam(&channels, generator))
-      return false;
-    if (!GenerateParam(&input_channels, generator))
-      return false;
     if (!GenerateParam(&sample_rate, generator))
       return false;
     if (!GenerateParam(&bits_per_sample, generator))
       return false;
     if (!GenerateParam(&frames_per_buffer, generator))
       return false;
+    if (!GenerateParam(&channels, generator))
+      return false;
     if (!GenerateParam(&effects, generator))
       return false;
     media::AudioParameters params(
         static_cast<media::AudioParameters::Format>(format),
         static_cast<media::ChannelLayout>(channel_layout),
-        channels, input_channels, sample_rate,
-        bits_per_sample, frames_per_buffer, effects);
+        channels,
+        sample_rate,
+        bits_per_sample,
+        frames_per_buffer,
+        effects);
     *p = params;
     return true;
   }
 };
 
 template <>
 struct GenerateTraits<media::VideoCaptureFormat> {
   static bool Generate(media::VideoCaptureFormat *p, Generator* generator) {
     int frame_size_width;
     int frame_size_height;
@@ skipping 472 matching lines @@
     return EXIT_FAILURE;
 
   return EXIT_SUCCESS;
 }
 
 }  // namespace ipc_fuzzer
 
 int main(int argc, char** argv) {
   return ipc_fuzzer::GenerateMain(argc, argv);
 }