Removing private protobuf header inclusion.
diff --git a/src/compiler/generator_helpers.h b/src/compiler/generator_helpers.h
new file mode 100644
index 0000000..0c14bb8
--- /dev/null
+++ b/src/compiler/generator_helpers.h
@@ -0,0 +1,79 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef NET_GRPC_COMPILER_GENERATOR_HELPERS_H__
+#define NET_GRPC_COMPILER_GENERATOR_HELPERS_H__
+
+#include <map>
+#include <string>
+
+namespace grpc_generator {
+
+inline bool StripSuffix(std::string *filename, const std::string &suffix) {
+  if (filename->length() >= suffix.length()) {
+    size_t suffix_pos = filename->length() - suffix.length();
+    if (filename->compare(suffix_pos, std::string::npos, suffix) == 0) {
+      filename->resize(filename->size() - suffix.size());
+      return true;
+    }
+  }
+
+  return false;
+}
+
+inline std::string StripProto(std::string filename) {
+  if (!StripSuffix(&filename, ".protodevel")) {
+    StripSuffix(&filename, ".proto");
+  }
+  return filename;
+}
+
+inline std::string StringReplace(std::string str, const std::string &from,
+                                 const std::string &to) {
+  size_t pos = 0;
+
+  for (;;) {
+    pos = str.find(from, pos);
+    if (pos == std::string::npos) {
+      break;
+    }
+    str.replace(pos, from.length(), to);
+    pos += to.length();
+  }
+
+  return str;
+}
+
+}  // namespace grpc_generator
+
+#endif  // NET_GRPC_COMPILER_GENERATOR_HELPERS_H__