Reenable testLanguageDetectionHttpContentLanguage on device.

Bug: 847948
Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I1aa8d2b06ccbe326beb9e7832cee69d60882b25c
Reviewed-on: https://chromium-review.googlesource.com/1159193
Commit-Queue: Lindsay Pasricha <lindsayw@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#580024}

ios/chrome/browser/translate/translate_egtest.mm

@@ -472,16 +472,8 @@ using translate::LanguageDetectionController;
   [self assertLanguageDetails:expectedLanguageDetails];
 }
 
-// TODO(crbug.com/847948): This test is faling on devices.
-#if TARGET_IPHONE_SIMULATOR
-#define MAYBE_testLanguageDetectionHttpContentLanguage \
-  testLanguageDetectionHttpContentLanguage
-#else
-#define MAYBE_testLanguageDetectionHttpContentLanguage \
-  DISABLED_testLanguageDetectionHttpContentLanguage
-#endif
 // Tests that language in http content is detected.
-- (void)MAYBE_testLanguageDetectionHttpContentLanguage {
+- (void)testLanguageDetectionHttpContentLanguage {
   // Start the HTTP server.
   std::unique_ptr<web::DataResponseProvider> provider(new TestResponseProvider);
   web::test::SetUpHttpServer(std::move(provider));