Add "Reachable Phones" feature to chrome://proximity-auth.

This tab shows phones that have recently responded to a CryptAuth ping, so we
can be confident that the phones are online and reachable.

BUG=409158
TEST=manual

Review URL: https://codereview.chromium.org/1259093006

Cr-Commit-Position: refs/heads/master@{#341796}

1 files changed, 13 insertions, 0 deletions

diff --git a/components/proximity_auth/webui/proximity_auth_webui_handler.h b/components/proximity_auth/webui/proximity_auth_webui_handler.h
index ce6f3b69..d0e8907 100644
--- a/components/proximity_auth/webui/proximity_auth_webui_handler.h
+++ b/components/proximity_auth/webui/proximity_auth_webui_handler.h
@@ -22,12 +22,17 @@ namespace base {
 class ListValue;
 }
 
+namespace cryptauth {
+class ExternalDeviceInfo;
+}
+
 namespace proximity_auth {
 
 class Authenticator;
 class BluetoothConnection;
 class Connection;
 class ClientImpl;
+class ReachablePhoneFlow;
 struct RemoteStatusUpdate;
 class SecureContext;
 
@@ -65,6 +70,7 @@ class ProximityAuthWebUIHandler : public content::WebUIMessageHandler,
   void GetLogMessages(const base::ListValue* args);
   void ClearLogBuffer(const base::ListValue* args);
   void FindEligibleUnlockDevices(const base::ListValue* args);
+  void FindReachableDevices(const base::ListValue* args);
   void GetLocalState(const base::ListValue* args);
   void ForceEnrollment(const base::ListValue* args);
   void ForceDeviceSync(const base::ListValue* args);
@@ -82,6 +88,10 @@ class ProximityAuthWebUIHandler : public content::WebUIMessageHandler,
   void OnFoundEligibleUnlockDevices(
       const cryptauth::FindEligibleUnlockDevicesResponse& response);
 
+  // Callback when |reachable_phone_flow_| completes.
+  void OnReachablePhonesFound(
+      const std::vector<cryptauth::ExternalDeviceInfo>& reachable_phones);
+
   // Called when the key agreement of PSK of the remote device completes.
   void OnPSKDerived(const cryptauth::ExternalDeviceInfo& unlock_key,
                     const std::string& persistent_symmetric_key);
@@ -138,6 +148,9 @@ class ProximityAuthWebUIHandler : public content::WebUIMessageHandler,
   // We only support one concurrent API call.
   scoped_ptr<CryptAuthClient> cryptauth_client_;
 
+  // The flow for getting a list of reachable phones.
+  scoped_ptr<ReachablePhoneFlow> reachable_phone_flow_;
+
   // True if the WebContents backing the WebUI has been initialized.
   bool web_contents_initialized_;