[CrOS Tether] Add tether network properties (battery percentage, carrier, and signal strength) to t…

chromeos/network/network_state.h

Index: chromeos/network/network_state.h
diff --git a/chromeos/network/network_state.h b/chromeos/network/network_state.h
index 17fa58bca8c2fbbbbeb12571011ad68fe5bbca0e..5ed132f8205914023cf13f629a3429afd5a5c253 100644
--- a/chromeos/network/network_state.h
+++ b/chromeos/network/network_state.h
@@ -10,6 +10,7 @@
 #include <string>
 #include <vector>
 
+#include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/values.h"
 #include "chromeos/network/managed_state.h"
@@ -81,6 +82,12 @@ class CHROMEOS_EXPORT NetworkState : public ManagedState {
   bool connectable() const { return connectable_; }
   bool is_captive_portal() const { return is_captive_portal_; }
   int signal_strength() const { return signal_strength_; }
+  // For Wi-Fi, WiMAX, and cellular networks, signal strength is set via updates
+  // from Shill, so SetSignalStrength() should not be called in those cases. For
+  // tether networks, the signal strength is received as a message from the
+  // tether host over Bluetooth, so it must be set via SetSignalStrength()
+  // since it does not come from Shill.
+  void SetTetherSignalStrength(int signal_strength);
 
   // Wifi property accessors
   const std::string& eap_method() const { return eap_method_; }
@@ -102,6 +109,11 @@ class CHROMEOS_EXPORT NetworkState : public ManagedState {
     return third_party_vpn_provider_extension_id_;
   }
 
+  // Tether accessors and setters.
+  int battery_percentage() const { return battery_percentage_; }
+  void SetBatteryPercentage(int battery_percentage);
+  const std::string& carrier() const { return carrier_; }
+  void SetCarrier(const std::string& carrier);
   const std::string& tether_guid() const { return tether_guid_; }
   void set_tether_guid(const std::string& guid) { tether_guid_ = guid; }
 
@@ -153,6 +165,7 @@ class CHROMEOS_EXPORT NetworkState : public ManagedState {
   friend class MobileActivatorTest;
   friend class NetworkStateHandler;
   friend class NetworkChangeNotifierChromeosUpdateTest;
+  FRIEND_TEST_ALL_PREFIXES(NetworkStateTest, TetherProperties);
 
   // Updates |name_| from WiFi.HexSSID if provided, and validates |name_|.
   // Returns true if |name_| changes.
@@ -213,6 +226,10 @@ class CHROMEOS_EXPORT NetworkState : public ManagedState {
   std::string vpn_provider_type_;
   std::string third_party_vpn_provider_extension_id_;
 
+  // Tether properties.
+  std::string carrier_;
+  int battery_percentage_;
+
   // TODO(pneubeck): Remove this once (Managed)NetworkConfigurationHandler
   // provides proxy configuration. crbug.com/241775
   base::DictionaryValue proxy_config_;