Use ScopedVector instead of std::vector in case of repeated messages.

base/json/json_value_converter_unittest.cc

Index: base/json/json_value_converter_unittest.cc
diff --git a/base/json/json_value_converter_unittest.cc b/base/json/json_value_converter_unittest.cc
index 73ed2299f1fc1565287906ef22237bd8a31f9050..71167f09fc4413775463b02aeb76cb89d717e007 100644
--- a/base/json/json_value_converter_unittest.cc
+++ b/base/json/json_value_converter_unittest.cc
@@ -10,6 +10,7 @@
 #include "base/values.h"
 #include "base/json/json_reader.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/scoped_vector.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
@@ -36,7 +37,7 @@ struct SimpleMessage {
 struct NestedMessage {
   double foo;
   SimpleMessage child;
-  std::vector<SimpleMessage> children;
+  ScopedVector<SimpleMessage> children;
 
   NestedMessage() : foo(0) {}
 
@@ -104,15 +105,17 @@ TEST(JSONValueConverterTest, ParseNestedMessage) {
   EXPECT_TRUE(message.child.baz);
 
   EXPECT_EQ(2, static_cast<int>(message.children.size()));
-  const SimpleMessage& first_child = message.children[0];
-  EXPECT_EQ(2, first_child.foo);
-  EXPECT_EQ("foobar", first_child.bar);
-  EXPECT_TRUE(first_child.baz);
-
-  const SimpleMessage& second_child = message.children[1];
-  EXPECT_EQ(3, second_child.foo);
-  EXPECT_EQ("barbaz", second_child.bar);
-  EXPECT_FALSE(second_child.baz);
+  const SimpleMessage* first_child = message.children[0];
+  ASSERT_TRUE(first_child);
+  EXPECT_EQ(2, first_child->foo);
+  EXPECT_EQ("foobar", first_child->bar);
+  EXPECT_TRUE(first_child->baz);
+
+  const SimpleMessage* second_child = message.children[1];
+  ASSERT_TRUE(second_child);
+  EXPECT_EQ(3, second_child->foo);
+  EXPECT_EQ("barbaz", second_child->bar);
+  EXPECT_FALSE(second_child->baz);
 }
 
 TEST(JSONValueConverterTest, ParseFailures) {