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

chrome/common/BUILD.gn

Index: chrome/common/BUILD.gn
diff --git a/chrome/common/BUILD.gn b/chrome/common/BUILD.gn
index eaf976791149e66f5ad0f4144dcce21d55adfd83..7911e1d129a983abd02bda3d92cb205816ddb7fe 100644
--- a/chrome/common/BUILD.gn
+++ b/chrome/common/BUILD.gn
@@ -137,6 +137,12 @@ static_library("common") {
         rebase_path(gypi_values.chrome_common_mac_sources, ".", "//chrome")
   }
 
+  if (enable_ipc_fuzzer) {
+    sources += rebase_path(gypi_values.chrome_common_ipc_fuzzer_sources,
+                           ".",
+                           "//chrome")
+  }
+
   if (enable_nacl) {
     deps += [ "//components/nacl:nacl_common" ]
   }