json_schema_compiler: Use std::vector<char> for binary values.

content/browser/speech/google_streaming_remote_engine_unittest.cc

Index: content/browser/speech/google_streaming_remote_engine_unittest.cc
diff --git a/content/browser/speech/google_streaming_remote_engine_unittest.cc b/content/browser/speech/google_streaming_remote_engine_unittest.cc
index 0f17fa054f5509e54d032fb926945894c964eb20..c3d7ce5c4e1be68ae49b3a3c6150b8b486a5a15b 100644
--- a/content/browser/speech/google_streaming_remote_engine_unittest.cc
+++ b/content/browser/speech/google_streaming_remote_engine_unittest.cc
@@ -333,12 +333,12 @@ TEST_F(GoogleStreamingRemoteEngineTest, Stability) {
 }
 
 TEST_F(GoogleStreamingRemoteEngineTest, SendPreamble) {
-  const int kPreambleLength = 100;
+  const size_t kPreambleLength = 100;
   scoped_refptr<SpeechRecognitionSessionPreamble> preamble =
       new SpeechRecognitionSessionPreamble();
   preamble->sample_rate = 16000;
   preamble->sample_depth = 2;
-  preamble->sample_data = std::string(kPreambleLength, 0);
+  preamble->sample_data.assign(kPreambleLength, 0);
   SpeechRecognitionEngine::Config config;
   config.auth_token = "foo";
   config.auth_scope = "bar";