Add a Kill switch for WebVR cardboard support through finch.

components/variations/android/variations_associated_data_android.cc

 // Copyright 2014 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 "components/variations/android/variations_associated_data_android.h"
 
 #include <string>
 
 #include "base/android/jni_string.h"
 #include "components/variations/variations_associated_data.h"
 #include "components/variations/variations_http_header_provider.h"
 #include "jni/VariationsAssociatedData_jni.h"
 
 using base::android::ConvertJavaStringToUTF8;
 using base::android::ConvertUTF8ToJavaString;
 using base::android::JavaParamRef;
 using base::android::ScopedJavaLocalRef;
 
 namespace variations {
 
 namespace android {
 
+jint GetVariationParamByFeatureAsInt(
+    JNIEnv* env,
+    const JavaParamRef<jclass>& clazz,
+    const jlong jfeature,
+    const JavaParamRef<jstring>& jparam_name,
+    const jint jdefault_value) {
+
+  base::Feature * feature = reinterpret_cast<base::Feature*>(jfeature);
+  if (feature == nullptr) {
+    return jdefault_value;
+  }
+
+  std::string param_name(ConvertJavaStringToUTF8(env, jparam_name));
+  int default_value = static_cast<int>(jdefault_value);
+

[rkaplow, 2017/01/31 18:17:44]

this recently got deprecated to the base:: version, you could switch if you
want:
https://codesearch.chromium.org/chromium/src/components/variations/variations...

[amp, 2017/01/31 18:41:43]

Acknowledged.

I'll update to the non-deprecated call, but per tedchoc@ comment I'll use it
from the feature_list file instead of changing anything in the variations
component (unless you have a concern about that).

+  return variations::GetVariationParamByFeatureAsInt(
+      *feature, param_name, default_value);
+}
+
 ScopedJavaLocalRef<jstring> GetVariationParamValue(
     JNIEnv* env,
     const JavaParamRef<jclass>& clazz,
     const JavaParamRef<jstring>& jtrial_name,
     const JavaParamRef<jstring>& jparam_name) {
   std::string trial_name(ConvertJavaStringToUTF8(env, jtrial_name));
   std::string param_name(ConvertJavaStringToUTF8(env, jparam_name));
   std::string param_value =
       variations::GetVariationParamValue(trial_name, param_name);
   return ConvertUTF8ToJavaString(env, param_value);
 }
 
 ScopedJavaLocalRef<jstring> GetFeedbackVariations(
     JNIEnv* env,
     const JavaParamRef<jclass>& clazz) {
   const std::string values =
       VariationsHttpHeaderProvider::GetInstance()->GetVariationsString();
   return ConvertUTF8ToJavaString(env, values);
 }
 
 bool RegisterVariationsAssociatedData(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android
 
 }  // namespace variations