[ObjC ARC] Converts ios/web:web to ARC.

ios/web/test/web_int_test.mm

Index: ios/web/test/web_int_test.mm
diff --git a/ios/web/test/web_int_test.mm b/ios/web/test/web_int_test.mm
index 8d5160b8840bf5b47382a5ab24f11017288fc004..cbc9812514222aef8aa3048aa396c9f61e27cacc 100644
--- a/ios/web/test/web_int_test.mm
+++ b/ios/web/test/web_int_test.mm
@@ -50,6 +50,7 @@ WebIntTest::WebIntTest() {}
 WebIntTest::~WebIntTest() {}
 
 void WebIntTest::SetUp() {
+  rootPool_ = [[NSAutoreleasePool alloc] init];
   WebTest::SetUp();
 
   // Start the http server.
@@ -84,6 +85,8 @@ void WebIntTest::TearDown() {
   EXPECT_FALSE(server.IsRunning());
 
   WebTest::TearDown();
+  [rootPool_ release];
+  rootPool_ = nil;
 }
 
 id WebIntTest::ExecuteJavaScript(NSString* script) {