Gin: Add support for binding JS methods to C++ instance methods.

gin/try_catch.cc

Index: gin/try_catch.cc
diff --git a/gin/try_catch.cc b/gin/try_catch.cc
index 89a969fa535c8e89df418aa3c588050474a077d4..a44e28e9fe53c90675852e87baf29945e075d11c 100644
--- a/gin/try_catch.cc
+++ b/gin/try_catch.cc
@@ -6,7 +6,6 @@
 
 #include <sstream>
 
-#include "base/logging.h"
 #include "gin/converter.h"
 
 namespace gin {
@@ -22,6 +21,10 @@ bool TryCatch::HasCaught() {
 }
 
 std::string TryCatch::GetStackTrace() {
+  if (!HasCaught()) {
+    return "";
+  }
+
   std::stringstream ss;
   v8::Handle<v8::Message> message = try_catch_.Message();
   ss << V8ToString(message->Get()) << std::endl