Add support for TraceEvent before the native library is loaded.

base/android/jni_array.cc

Index: base/android/jni_array.cc
diff --git a/base/android/jni_array.cc b/base/android/jni_array.cc
index a1573543d09fe75fb7037b9559a56d7df05d4aae..3ad9b5757583dd4f5eb7171d038009597e98452f 100644
--- a/base/android/jni_array.cc
+++ b/base/android/jni_array.cc
@@ -163,6 +163,18 @@ void AppendJavaByteArrayToByteVector(JNIEnv* env,
                           reinterpret_cast<int8*>(&(*out)[back]));
 }
 
+void AppendJavaLongArrayToLongVector(JNIEnv* env,
+                                     jlongArray long_array,
+                                     std::vector<int64_t>* out) {
+  DCHECK(out);
+  if (!long_array)
+    return;
+  jsize len = env->GetArrayLength(long_array);
+  jlong* longs = env->GetLongArrayElements(long_array, NULL);
+  out->insert(out->end(), longs, longs + len);
+  env->ReleaseLongArrayElements(long_array, longs, JNI_ABORT);
+}
+
 void JavaByteArrayToByteVector(JNIEnv* env,
                                jbyteArray byte_array,
                                std::vector<uint8>* out) {