[chromedriver] Use percentFull instead of value in Tracing.bufferUsage.

chrome/test/chromedriver/performance_logger_unittest.cc

Index: chrome/test/chromedriver/performance_logger_unittest.cc
diff --git a/chrome/test/chromedriver/performance_logger_unittest.cc b/chrome/test/chromedriver/performance_logger_unittest.cc
index 0c906ec9358f5cde71073acd0a6bda0758937c9a..68168622680154afb2effb00e184c56a9c7170e4 100644
--- a/chrome/test/chromedriver/performance_logger_unittest.cc
+++ b/chrome/test/chromedriver/performance_logger_unittest.cc
@@ -380,7 +380,7 @@ TEST(PerformanceLogger, WarnWhenTraceBufferFull) {
   client.AddListener(&logger);
   logger.OnConnected(&client);
   base::DictionaryValue params;
-  params.SetDouble("value", 1.0);
+  params.SetDouble("percentFull", 1.0);
   ASSERT_EQ(kOk, client.TriggerEvent("Tracing.bufferUsage", params).code());
 
   ASSERT_EQ(1u, log.GetEntries().size());