Add a Kill switch for WebVR cardboard support through finch.

chrome/browser/android/chrome_feature_list.cc

 // Copyright 2015 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 "chrome/browser/android/chrome_feature_list.h"
 
 #include <stddef.h>
 
 #include <string>
 
 #include "base/android/jni_string.h"
 #include "base/feature_list.h"
 #include "base/macros.h"
+#include "base/metrics/field_trial_params.h"
 #include "chrome/common/chrome_features.h"
 #include "components/autofill/core/browser/autofill_experiments.h"
 #include "components/ntp_snippets/features.h"
 #include "components/offline_pages/core/offline_page_feature.h"
 #include "components/password_manager/core/common/password_manager_features.h"
 #include "content/public/common/content_features.h"
 #include "jni/ChromeFeatureList_jni.h"
 
 using base::android::ConvertJavaStringToUTF8;
 using base::android::JavaParamRef;
@@ skipping 29 matching lines @@
     &kNTPOfflinePagesFeature,
     &kNTPSuggestionsStandaloneUIFeature,
     &kPhysicalWebFeature,
     &kPhysicalWebIgnoreOtherClientsFeature,
     &kSpecialLocaleFeature,
     &kSpecialLocaleWrapper,
     &kTabsInCBD,
     &kTabReparenting,
     &kWebPaymentsModifiers,
     &kWebPaymentsSingleAppUiSkip,
+    &kWebVRCardboardSupport,
     &ntp_snippets::kIncreasedVisibility,
     &ntp_snippets::kForeignSessionsSuggestionsFeature,
     &ntp_snippets::kOfflineBadgeFeature,
     &ntp_snippets::kSaveToOfflineFeature,
     &ntp_snippets::kSectionDismissalFeature,
     &offline_pages::kBackgroundLoaderForDownloadsFeature,
     &offline_pages::kOfflinePagesCTFeature,  // See crbug.com/620421.
     &offline_pages::kOfflinePagesSharingFeature,
     &password_manager::features::kViewPasswords,
 };
@@ skipping 64 matching lines @@
 
 const base::Feature kUserMediaScreenCapturing{
     "UserMediaScreenCapturing", base::FEATURE_DISABLED_BY_DEFAULT};
 
 const base::Feature kWebPaymentsModifiers{"WebPaymentsModifiers",
                                           base::FEATURE_DISABLED_BY_DEFAULT};
 
 const base::Feature kWebPaymentsSingleAppUiSkip{
     "WebPaymentsSingleAppUiSkip", base::FEATURE_ENABLED_BY_DEFAULT};
 
+const base::Feature kWebVRCardboardSupport{
+    "WebVRCardboardSupport", base::FEATURE_ENABLED_BY_DEFAULT};
+
 static jboolean IsEnabled(JNIEnv* env,
                           const JavaParamRef<jclass>& clazz,
                           const JavaParamRef<jstring>& jfeature_name) {
   const std::string feature_name = ConvertJavaStringToUTF8(env, jfeature_name);
   for (size_t i = 0; i < arraysize(kFeaturesExposedToJava); ++i) {
     if (kFeaturesExposedToJava[i]->name == feature_name)
       return base::FeatureList::IsEnabled(*kFeaturesExposedToJava[i]);
   }
   // Features queried via this API must be present in |kFeaturesExposedToJava|.
   NOTREACHED();
   return false;
 }
 
+static jint GetFieldTrialParamByFeatureAsInt(
+    JNIEnv* env,
+    const JavaParamRef<jclass>& clazz,
+    const JavaParamRef<jstring>& jfeature_name,
+    const JavaParamRef<jstring>& jparam_name,
+    const jint jdefault_value) {
+  const std::string feature_name = ConvertJavaStringToUTF8(env, jfeature_name);
+  const std::string param_name = ConvertJavaStringToUTF8(env, jparam_name);
+  int default_value = static_cast<int>(jdefault_value);
+
+  for (size_t i = 0; i < arraysize(kFeaturesExposedToJava); ++i) {
+    if (kFeaturesExposedToJava[i]->name == feature_name)
+      return base::GetFieldTrialParamByFeatureAsInt(
+          *kFeaturesExposedToJava[i], param_name, default_value);
+  }
+  // Features queried via this API must be present in |kFeaturesExposedToJava|.
+  NOTREACHED();
+  return jdefault_value;
+}
+
 bool RegisterChromeFeatureListJni(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android
 }  // namespace chrome