linux (and some posix): multiprocess plugins compiling.

base/string_util_posix.h

Index: base/string_util_posix.h
diff --git a/base/string_util_posix.h b/base/string_util_posix.h
index 2660ba2708edc91a2188809d81a0eec6c3e01b2c..b503685a849e032d226a55be51778f228d6d7ab0 100644
--- a/base/string_util_posix.h
+++ b/base/string_util_posix.h
@@ -14,6 +14,12 @@
 
 namespace base {
 
+// Chromium code style is to not use malloc'd strings; this is only for use
+// for interaction with APIs that require it.
+inline char* strdup(const char* str) {
+  return ::strdup(str);
+}
+
 inline int strcasecmp(const char* string1, const char* string2) {
   return ::strcasecmp(string1, string2);
 }