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

chrome/browser/BUILD.gn

Index: chrome/browser/BUILD.gn
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index 90ace2a7068a1c6d7b67ea00cc6b7d1c66c19e31..af959778e36c638dfab0ad4126f0fd5c96737aa3 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -10,7 +10,6 @@ import("//chrome/common/features.gni")
 import("//media/media_options.gni")
 import("//third_party/kasko/kasko.gni")
 import("//third_party/protobuf/proto_library.gni")
-import("//tools/ipc_fuzzer/ipc_fuzzer.gni")
 
 # //build/config/android/rules.gni imports //tools/grit/grit_rule.gni, which
 # produces a conflict for the "grit" template so we have to only include one.
@@ -960,10 +959,6 @@ source_set("browser") {
       "chrome_browser_main_extra_parts_exo.h",
     ]
   }
-
-  if (enable_ipc_fuzzer) {
-    configs += [ "//tools/ipc_fuzzer:ipc_fuzzer_config" ]
-  }
 }
 
 if (android_java_ui) {