[chromedriver] Add an error autoreporting feature that automatically raises errors from browser logs

chrome/test/chromedriver/logging_unittest.cc

Index: chrome/test/chromedriver/logging_unittest.cc
diff --git a/chrome/test/chromedriver/logging_unittest.cc b/chrome/test/chromedriver/logging_unittest.cc
index 0520e8d4fc73cc2efeed5c9dd835c9992c86d9c3..7912b6360eff526784122fce4ed6cf0f74ec77cf 100644
--- a/chrome/test/chromedriver/logging_unittest.cc
+++ b/chrome/test/chromedriver/logging_unittest.cc
@@ -135,3 +135,19 @@ TEST(Logging, DefaultLogs) {
   ASSERT_EQ(1u, listeners.size());
   ASSERT_EQ("browser", logs[0]->type());
 }
+
+TEST(Logging, GetFirstErrorMessage) {
+  WebDriverLog log(WebDriverLog::kBrowserType, Log::kAll);
+  std::string entry;
+
+  entry = log.GetFirstErrorMessage();
+  ASSERT_TRUE(entry.empty());
+
+  log.AddEntry(Log::kInfo, "info message");
+  log.AddEntry(Log::kError, "first error message");
+  log.AddEntry(Log::kDebug, "debug message");
+  log.AddEntry(Log::kError, "second error message");
+
+  entry = log.GetFirstErrorMessage();
+  ASSERT_EQ("first error message", entry);
+}