Move IPC fuzzer switches and helpers from chrome/common to content/common.

content/public/common/content_switches.cc

Index: content/public/common/content_switches.cc
diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
index 1bd5b0894789cbe44a2a0988d335b491c2686cac..1860101f5d915cb4e0fa73b5f2c7207ce26fea9b 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -1048,6 +1048,15 @@ const char kMemoryPressureThresholdsMb[] = "memory-pressure-thresholds-mb";
 const char kTraceExportEventsToETW[] = "trace-export-events-to-etw";
 #endif
 
+#if defined(ENABLE_IPC_FUZZER)
+// 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";
+#endif
+
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches