Add java exception information to BuildInfo.

base/android/build_info.cc

Index: base/android/build_info.cc
diff --git a/base/android/build_info.cc b/base/android/build_info.cc
index 157ce42420f2032037b9a51f898ad6ca153ecccd..34a1575462776b44b851a351fb054e8aa0543b98 100644
--- a/base/android/build_info.cc
+++ b/base/android/build_info.cc
@@ -58,6 +58,11 @@ BuildInfo* BuildInfo::GetInstance() {
   return Singleton<BuildInfo, LeakySingletonTraits<BuildInfo> >::get();
 }
 
+void BuildInfo::set_java_exception_info(const std::string& info) {
+  DCHECK(!java_exception_info_) << "info should be set only once.";
+  java_exception_info_ = strndup(info.c_str(), 1024);
+}
+
 bool RegisterBuildInfo(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }