Append playinline=chrome_inline to the store referrer on native app banner install.

chrome/browser/android/banners/app_banner_manager_android.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/banners/app_banner_manager_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/command_line.h"
 #include "base/metrics/field_trial.h"
 #include "chrome/browser/android/banners/app_banner_data_fetcher_android.h"
 #include "chrome/browser/banners/app_banner_metrics.h"
 #include "chrome/common/chrome_constants.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/frame_navigate_params.h"
 #include "jni/AppBannerManager_jni.h"
 
 using base::android::ConvertJavaStringToUTF8;
 using base::android::ConvertJavaStringToUTF16;
 using base::android::ConvertUTF8ToJavaString;
 using base::android::ConvertUTF16ToJavaString;
 
 namespace {
 
 const char kPlayPlatform[] = "play";
 const char kReferrerName[] = "referrer";
 const char kIdName[] = "id";
+const char kPlayInlineReferrer[] = "playinline=chrome_inline";
 
 }  // anonymous namespace
 
 namespace banners {
 
 AppBannerManagerAndroid::AppBannerManagerAndroid(JNIEnv* env,
                                                  jobject obj,
                                                  int icon_size)
     : AppBannerManager(icon_size),
       weak_java_banner_view_manager_(env, obj) {
@@ skipping 28 matching lines @@
   if (jobj.is_null())
     return false;
 
   std::string id_from_app_url = ExtractQueryValueForName(url, kIdName);
   if (id_from_app_url.size() && id != id_from_app_url) {
     banners::OutputDeveloperDebugMessage(web_contents(),
                                          banners::kIgnoredIdsDoNotMatch);
     return false;
   }
 
-  std::string referrer = ExtractQueryValueForName(url, kReferrerName);
+  std::string referrer =
+      ExtractQueryValueForName(url, kReferrerName);
+
+  // Attach the chrome_inline referrer value, prefixed with "&" if the referrer
+  // is non empty.
+  if (referrer.empty())
+    referrer = kPlayInlineReferrer;
+  else
+    referrer.append("&").append(kPlayInlineReferrer);
 
   ScopedJavaLocalRef<jstring> jurl(
       ConvertUTF8ToJavaString(env, data_fetcher()->validated_url().spec()));
   ScopedJavaLocalRef<jstring> jpackage(
       ConvertUTF8ToJavaString(env, id));
   ScopedJavaLocalRef<jstring> jreferrer(
       ConvertUTF8ToJavaString(env, referrer));
   Java_AppBannerManager_fetchAppDetails(env, jobj.obj(), jurl.obj(),
                                         jpackage.obj(), jreferrer.obj(),
                                         ideal_icon_size());
@@ skipping 100 matching lines @@
                                       jdouble indirect_engagement) {
   AppBannerManager::ForceEngagementWeightsForTesting(direct_engagement,
                                                      indirect_engagement);
 }
 
 jboolean IsEnabled(JNIEnv* env, jclass clazz) {
   return base::FieldTrialList::FindFullName("AppBanners") == "Enabled";
 }
 
 }  // namespace banners