Add polling and audio check to copresence.

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

Index: chrome/browser/extensions/api/copresence/copresence_api.h
diff --git a/chrome/browser/extensions/api/copresence/copresence_api.h b/chrome/browser/extensions/api/copresence/copresence_api.h
index 7682f312d4cf1adcba9828d82451852e44d9e78d..01e56dda9de1b36e31ec1f7c6dec2d12bca4f42d 100644
--- a/chrome/browser/extensions/api/copresence/copresence_api.h
+++ b/chrome/browser/extensions/api/copresence/copresence_api.h
@@ -6,6 +6,7 @@
 #define CHROME_BROWSER_EXTENSIONS_API_COPRESENCE_COPRESENCE_API_H_
 
 #include <map>
+#include <set>
 #include <string>
 #include <vector>
 
@@ -45,6 +46,8 @@ class CopresenceService : public BrowserContextKeyedAPI,
     return apps_by_subscription_id_;
   }
 
+  std::set<std::string>& copresence_apps() { return copresence_apps_; }
+
   void set_api_key(const std::string& app_id,
                    const std::string& api_key);
   void set_auth_token(const std::string& token);
@@ -63,6 +66,7 @@ class CopresenceService : public BrowserContextKeyedAPI,
   void HandleMessages(const std::string& app_id,
                       const std::string& subscription_id,
                       const std::vector<copresence::Message>& message) override;
+  void HandleStatusUpdate(copresence::CopresenceStatus status) override;
   net::URLRequestContextGetter* GetRequestContext() const override;
   const std::string GetPlatformVersionString() const override;
   const std::string GetAPIKey(const std::string& app_id) const override;
@@ -74,6 +78,7 @@ class CopresenceService : public BrowserContextKeyedAPI,
 
   bool is_shutting_down_;
   std::map<std::string, std::string> apps_by_subscription_id_;
+  std::set<std::string> copresence_apps_;
 
   content::BrowserContext* const browser_context_;
   std::map<std::string, std::string> api_keys_by_app_;