Add a flag to dump IPC messages sent from the renderer to the browser.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 0508a62eaf88182846e338e8ec97c156a7f0924b..9bfb4b26c3674e79b8a42f842c4e6f104ad33477 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -735,6 +735,10 @@ const char kDisableJavaScriptHarmonyShipping[] =
 // Enables experimental Harmony (ECMAScript 6) features.
 const char kJavaScriptHarmony[]             = "javascript-harmony";
 
+// Dumps IPC messages sent from renderer processes to the browser process to
+// the given directory. Used primarily to gather samples for IPC fuzzing.
+const char kIpcDumpDirectory[]              = "ipc-dump-directory";
+
 // Specifies the testcase used by the IPC fuzzer.
 const char kIpcFuzzerTestcase[]             = "ipc-fuzzer-testcase";