Enable exporting SSLKEYLOGFILE on Android w/ command line arguments

chrome/browser/io_thread.h

Index: chrome/browser/io_thread.h
diff --git a/chrome/browser/io_thread.h b/chrome/browser/io_thread.h
index 5ef542fb8b2312b9cfe45a1a50ae0b08179a284c..4dcbba8f7a2172bf451c9bb004fb4f8b891c4852 100644
--- a/chrome/browser/io_thread.h
+++ b/chrome/browser/io_thread.h
@@ -266,6 +266,12 @@ class IOThread : public content::BrowserThreadDelegate {
 
   friend class test::IOThreadPeer;
 
+  // Gets file path into ssl_keylog_file from command line argument or
+  // environment variable. Command line argument has priority when
+  // both specified.
+  void GetSSLKeyLogFile(const base::CommandLine& command_line,

[Bryan McQuade, 2015/10/15 19:11:13]

this should return std::string rather than using an out parameter. see
https://google-styleguide.googlecode.com/svn/trunk/cppguide.html#Reference_Ar...
for more info.

[Zhongyi Shi, 2015/10/15 19:47:57]

Done.

+                        std::string& ssl_keylog_file);
+
   // BrowserThreadDelegate implementation, runs on the IO thread.
   // This handles initialization and destruction of state that must
   // live on the IO thread.