Get render_process_host to build on Linux by butchering a bunch of files.

chrome/common/ipc_message_utils.h

Index: chrome/common/ipc_message_utils.h
diff --git a/chrome/common/ipc_message_utils.h b/chrome/common/ipc_message_utils.h
index 39bb2313d18700d0e92f7c0a7e1481e9174416ee..e7cf083baa338dd0071f42b7fed00bc0de944a6e 100644
--- a/chrome/common/ipc_message_utils.h
+++ b/chrome/common/ipc_message_utils.h
@@ -208,6 +208,25 @@ struct ParamTraits<uint64> {
   }
 };
 
+#if !defined(OS_WIN)
+// TODO(port): why do we need this?
+template <>
+struct ParamTraits<void*> {
+  typedef void* param_type;
+  static void Write(Message* m, const param_type& p) {
+    COMPILE_ASSERT(sizeof(long) == sizeof(void*),
+                   assumes_pointers_and_longs_same_size);
+    m->WriteLong(bit_cast<long>(p));
+  }
+  static bool Read(const Message* m, void** iter, param_type* r) {
+    return m->ReadLong(iter, reinterpret_cast<long*>(r));
+  }
+  static void Log(const param_type& p, std::wstring* l) {
+    l->append(StringPrintf(L"%x", p));
+  }
+};
+#endif
+
 template <>
 struct ParamTraits<double> {
   typedef double param_type;