Fix IPC fuzzer build.

Remove unused input_channels parameter from fuzzed media::AudioParameters generation.
Link against new components/pdf files.

Review URL: https://codereview.chromium.org/518923003

Cr-Commit-Position: refs/heads/master@{#292689}

tools/ipc_fuzzer/message_lib/message_lib.gyp

@@ -8,6 +8,7 @@
     'message_lib_deps': [
       '../../../base/base.gyp:base',
       '../../../chrome/chrome.gyp:common',
+      '../../../components/components.gyp:pdf_common',
       '../../../components/nacl.gyp:nacl_common',
       '../../../content/content.gyp:content_child',
       '../../../ipc/ipc.gyp:ipc',

tools/ipc_fuzzer/mutate/generate.cc

@@ -823,33 +823,33 @@ 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;
   }