added silence and verbose mode

Author: AndriyP

src/chrome/test/webdriver/webdriver_server.cc

@@ -86,6 +86,48 @@ namespace webdriver {
 
 namespace {
 
+void silentMessageOutput(QtMsgType type, const char *msg)
+{
+    // keep silence
+    return;
+}
+
+void normalMessageOutput(QtMsgType type, const char *msg)
+{
+     switch (type) {
+     case QtDebugMsg:
+         // keep silence
+         break;
+     case QtWarningMsg:
+         fprintf(stderr, "Warning: %s\n", msg);
+         break;
+     case QtCriticalMsg:
+         fprintf(stderr, "Critical: %s\n", msg);
+         break;
+     case QtFatalMsg:
+         fprintf(stderr, "Fatal: %s\n", msg);
+         abort();
+     }
+}
+
+void verboseMessageOutput(QtMsgType type, const char *msg)
+{
+     switch (type) {
+     case QtDebugMsg:
+         fprintf(stderr, "Debug: %s\n", msg);
+         break;
+     case QtWarningMsg:
+         fprintf(stderr, "Warning: %s\n", msg);
+         break;
+     case QtCriticalMsg:
+         fprintf(stderr, "Critical: %s\n", msg);
+         break;
+     case QtFatalMsg:
+         fprintf(stderr, "Fatal: %s\n", msg);
+         abort();
+     }
+}
+
 void InitCallbacks(Dispatcher* dispatcher,
                    base::WaitableEvent* shutdown_event,
                    bool forbid_other_requests) {
@@ -241,6 +283,22 @@ int RunChromeDriver() {
   base::WaitableEvent shutdown_event(false, false);
   CommandLine* cmd_line = CommandLine::ForCurrentProcess();
 
+  // set default output mode
+  qInstallMsgHandler(normalMessageOutput);
+
+  // check if verbose mode
+  if (cmd_line->HasSwitch("verbose")) {
+      qInstallMsgHandler(verboseMessageOutput);
+  }
+
+  // check if silence mode
+  if (cmd_line->HasSwitch("silence")) {
+      std::ostream null_stream(0);
+      std::cerr.rdbuf(null_stream.rdbuf());
+      std::cout.rdbuf(null_stream.rdbuf());
+      qInstallMsgHandler(silentMessageOutput);
+  }
+
 //#if defined(OS_POSIX)
 //  signal(SIGPIPE, SIG_IGN);
 //#endif
@@ -322,20 +380,18 @@ int RunChromeDriver() {
 
   // The tests depend on parsing the first line ChromeDriver outputs,
   // so all other logging should happen after this.
-  if (!cmd_line->HasSwitch("silent")) {
-    std::cout << "************************"<< std::endl
-              << "Started WebDriver" << std::endl
-              << "port=" << port << std::endl
-              << "root=" << root << std::endl
-              << "url-base=" << url_base << std::endl
-              << "http-threads=" << http_threads << std::endl
-              /*<< "version=" << chrome::kChromeVersion << std::endl*/;
-    if (logging_success)
+  std::cout << "************************"<< std::endl
+            << "Started WebDriver" << std::endl
+            << "port=" << port << std::endl
+            << "root=" << root << std::endl
+            << "url-base=" << url_base << std::endl
+            << "http-threads=" << http_threads << std::endl
+            /*<< "version=" << chrome::kChromeVersion << std::endl*/;
+  if (logging_success)
       std::cout << "log=" << FileLog::Get()->path().value() << std::endl;
-    else
+  else
       std::cout << "Log file could not be created. log = " << FileLog::Get()->path().value() << std::endl;
-    std::cout << "************************"<< std::endl;
-  }
+  std::cout << "************************"<< std::endl;
 
   // Run until we receive command to shutdown.
   // Don't call mg_stop because mongoose will hang if clients are still