Fixing loglevel in chrome driver to accept string rather than an integer.

chrome/test/webdriver/webdriver_logging.h

Index: chrome/test/webdriver/webdriver_logging.h
diff --git a/chrome/test/webdriver/webdriver_logging.h b/chrome/test/webdriver/webdriver_logging.h
index 95fe86b8de4a18e3d6f108d9680f3a647dcf1350..ea8033f854e43bf877205b5e0548e1c2a1e7df28 100644
--- a/chrome/test/webdriver/webdriver_logging.h
+++ b/chrome/test/webdriver/webdriver_logging.h
@@ -30,6 +30,9 @@ enum LogLevel {
   kAllLogLevel = -1000
 };
 
+// |name| should be a webdriver log level, such as "INFO", "SEVERE", etc.
+LogLevel LogLevelFromString(const std::string& name);
+
 // Represents a type/source of a WebDriver log.
 class LogType {
  public: