Using API key specified from js

chrome/browser/extensions/api/copresence/copresence_api.cc

Index: chrome/browser/extensions/api/copresence/copresence_api.cc
diff --git a/chrome/browser/extensions/api/copresence/copresence_api.cc b/chrome/browser/extensions/api/copresence/copresence_api.cc
index f4acd8b55a2082db2a066df0ed70e4a9060cc7eb..3894b30bee802d31f6ddf3305fa490400ea226e1 100644
--- a/chrome/browser/extensions/api/copresence/copresence_api.cc
+++ b/chrome/browser/extensions/api/copresence/copresence_api.cc
@@ -34,6 +34,8 @@ const char kShuttingDownMessage[] = "Shutting down.";
 
 CopresenceService::CopresenceService(content::BrowserContext* context)
     : is_shutting_down_(false), browser_context_(context) {
+  device_fingerprint_.set_platform_version(
+      chrome::VersionInfo().CreateVersionString());
 }
 
 CopresenceService::~CopresenceService() {
@@ -105,8 +107,13 @@ net::URLRequestContextGetter* CopresenceService::GetRequestContext() const {
   return browser_context_->GetRequestContext();
 }
 
-const std::string CopresenceService::GetPlatformVersionString() const {
-  return chrome::VersionInfo().CreateVersionString();
+const copresence::DeviceFingerprint&
+CopresenceService::GetDeviceFingerprint() const {
+  return device_fingerprint_;
+}
+
+const std::string& GetAPIKey() const {
+  return api_key_;
 }
 
 copresence::WhispernetClient* CopresenceService::GetWhispernetClient() {
@@ -163,8 +170,8 @@ ExtensionFunction::ResponseAction CopresenceSetApiKeyFunction::Run() {
       api::copresence::SetApiKey::Params::Create(*args_));
   EXTENSION_FUNCTION_VALIDATE(params.get());
 
-  // TODO(rkc): Use the API key set by this function for this app.
-  // http://crbug.com/400617.
+  // The api key may be set to empty, to clear it.
+  api_key_ = params->apiKey;
   return RespondNow(NoArguments());
 }