Add support for TraceEvent before the native library is loaded.

base/android/jni_array_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/android/jni_array.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/scoped_java_ref.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 66 matching lines @@
 
 TEST(JniArray, LongConversions) {
   const int64 kLongs[] = { 0, 1, -1, kint64min, kint64max};
   const size_t kLen = arraysize(kLongs);
 
   JNIEnv* env = AttachCurrentThread();
   CheckLongConversion(env, kLongs, kLen, ToJavaLongArray(env, kLongs, kLen));
 
   const std::vector<int64> vec(kLongs, kLongs + kLen);
   CheckLongConversion(env, kLongs, kLen, ToJavaLongArray(env, vec));
+
+  std::vector<int64_t> longs;
+  ScopedJavaLocalRef<jlongArray> jlongs = ToJavaLongArray(env, vec);
+  AppendJavaLongArrayToLongVector(env, jlongs.obj(), &longs);
+  for (size_t i = 0; i < kLen; ++i) {
+    ASSERT_EQ(vec[i], longs[i]);
+  }
 }
 
 TEST(JniArray, JavaIntArrayToIntVector) {
   const int kInts[] = {0, 1, -1};
   const size_t kLen = arraysize(kInts);
 
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jintArray> jints(env, env->NewIntArray(kLen));
   ASSERT_TRUE(jints.obj());
 
@@ skipping 73 matching lines @@
 
   EXPECT_EQ(static_cast<size_t>(kMaxItems), vec.size());
   for (int i = 0; i < kMaxItems; ++i) {
     snprintf(text, sizeof text, "%d", i);
     EXPECT_STREQ(text, vec[i].c_str());
   }
 }
 
 }  // namespace android
 }  // namespace base