Connect BackgroundFetch to the OfflineItemCollection

content/browser/background_fetch/background_fetch_registration_id.cc

Index: content/browser/background_fetch/background_fetch_registration_id.cc
diff --git a/content/browser/background_fetch/background_fetch_registration_id.cc b/content/browser/background_fetch/background_fetch_registration_id.cc
index db7653bbb1bcc0ca051d49c2c8e78cf9ff0f3ab0..84240cebdecb83f75db2ceb24f6620991e1192b7 100644
--- a/content/browser/background_fetch/background_fetch_registration_id.cc
+++ b/content/browser/background_fetch/background_fetch_registration_id.cc
@@ -4,12 +4,24 @@
 
 #include "content/browser/background_fetch/background_fetch_registration_id.h"
 
+#include <iterator>
+#include <sstream>
 #include <tuple>
 
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/string_split.h"
+#include "base/strings/stringprintf.h"
 #include "content/common/service_worker/service_worker_types.h"
 
 namespace content {
 
+namespace {
+
+const int kSerializationVersion = 0;
+const char kSeparator = '#';
+
+}  // namespace
+
 BackgroundFetchRegistrationId::BackgroundFetchRegistrationId()
     : service_worker_registration_id_(kInvalidServiceWorkerRegistrationId) {}
 
@@ -29,6 +41,55 @@ BackgroundFetchRegistrationId::BackgroundFetchRegistrationId(
 
 BackgroundFetchRegistrationId::~BackgroundFetchRegistrationId() = default;
 
+// Serialization format is:
+// version#service_worker_registration_id#origin#tag
+std::string BackgroundFetchRegistrationId::Serialize() const {
+  return base::StringPrintf(
+      "%d%c%s%c%s%c%s", kSerializationVersion, kSeparator,
+      base::Int64ToString(service_worker_registration_id_).c_str(), kSeparator,
+      origin_.Serialize().c_str(), kSeparator, tag_.c_str());
+}
+
+// static
+bool BackgroundFetchRegistrationId::Deserialize(
+    const std::string& serialized_registration_id,
+    BackgroundFetchRegistrationId* out_registration_id) {
+  DCHECK(out_registration_id);
+  std::vector<std::string> parts =
+      base::SplitString(serialized_registration_id, std::string(1, kSeparator),
+                        base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
+  if (parts.size() <= 3)
+    return false;
+
+  // Currently, only a single version is supported.
+  int serialization_version;
+  if (!base::StringToInt(parts[0], &serialization_version) ||
+      kSerializationVersion != serialization_version)
+    return false;
+
+  if (!base::StringToInt64(
+          parts[1], &out_registration_id->service_worker_registration_id_)) {
+    return false;
+  }
+
+  out_registration_id->origin_ = url::Origin(GURL(parts[2]));
+  if (out_registration_id->origin_.unique())
+    return false;
+
+  std::ostringstream tag;
+  tag << parts[3];
+
+  // It's valid for a tag to contain the |kSeparator|, so concatenate further
+  // parts, if any, with the |tag|. This should be a rare case.
+  for (size_t i = 4; i < parts.size(); i++)
+    tag << kSeparator << parts[i];
+
+  out_registration_id->tag_ = tag.str();
+
+  // The tag must be a non-empty string.
+  return !out_registration_id->tag_.empty();
+}
+
 BackgroundFetchRegistrationId& BackgroundFetchRegistrationId::operator=(
     const BackgroundFetchRegistrationId& other) = default;