headless: Add command line flags for logging

headless/app/headless_shell_switches.h

Index: headless/app/headless_shell_switches.h
diff --git a/headless/app/headless_shell_switches.h b/headless/app/headless_shell_switches.h
index 9d0a348e6e705f699dd31cf6692f3f92d4b3f343..74ee37bcad45d507be5365b7ead7d8f779737bca 100644
--- a/headless/app/headless_shell_switches.h
+++ b/headless/app/headless_shell_switches.h
@@ -5,6 +5,8 @@
 #ifndef HEADLESS_APP_HEADLESS_SHELL_SWITCHES_H_
 #define HEADLESS_APP_HEADLESS_SHELL_SWITCHES_H_
 
+#include "content/public/common/content_switches.h"
+
 namespace headless {
 namespace switches {
 extern const char kDeterministicFetch[];
@@ -19,6 +21,11 @@ extern const char kUseGL[];
 extern const char kUserDataDir[];
 extern const char kVirtualTimeBudget[];
 extern const char kWindowSize[];
+
+// Switches which are replicated from content.

[Eric Seckler, 2017/02/02 22:50:12]

while you're at it, shall we move kRemoteDebuggingPort and kHostResolverRules)
over here as well, and then get rid of content_switches.h include in
headless_shell.cc? :)

[Sami, 2017/02/02 23:15:33]

Done.

+using ::switches::kEnableLogging;
+using ::switches::kLoggingLevel;
+
 }  // namespace switches
 }  // namespace headless