Initilize V8 before use

In r24067 V8 removed auto-initialization and now the call has to
be made manually.

Bug: 18142688
Change-Id: I87964ebb4451ac5aef42984cc7789d9c79499a6a
diff --git a/src/proxy_resolver_v8.cc b/src/proxy_resolver_v8.cc
index dcd27a1..4867183 100644
--- a/src/proxy_resolver_v8.cc
+++ b/src/proxy_resolver_v8.cc
@@ -709,7 +709,7 @@
     ProxyErrorListener* error_listener)
     : context_(NULL), js_bindings_(custom_js_bindings),
       error_listener_(error_listener) {
-
+  v8::V8::Initialize();
 }
 
 ProxyResolverV8::~ProxyResolverV8() {