Continuation of CL 5685007, rename the singleton accessor method in more files.

chrome/browser/chromeos/network_state_notifier.h

Index: chrome/browser/chromeos/network_state_notifier.h
diff --git a/chrome/browser/chromeos/network_state_notifier.h b/chrome/browser/chromeos/network_state_notifier.h
index 94e57f41432a9385a5c9d8ed361977b99325d66a..31103f0b30b30c45671baba9f113f6899af336cf 100644
--- a/chrome/browser/chromeos/network_state_notifier.h
+++ b/chrome/browser/chromeos/network_state_notifier.h
@@ -48,7 +48,7 @@ class NetworkStateDetails {
 class NetworkStateNotifier : public NetworkLibrary::NetworkManagerObserver {
  public:
   // Returns the singleton instance of the network state notifier;
-  static NetworkStateNotifier* Get();
+  static NetworkStateNotifier* GetInstance();
 
   // The duration of being in offline. The value is undefined when
   // when network is connected.
@@ -56,7 +56,7 @@ class NetworkStateNotifier : public NetworkLibrary::NetworkManagerObserver {
 
   // Returns true if the network is connected.
   static bool is_connected() {
-    return Get()->state_ == NetworkStateDetails::CONNECTED;
+    return GetInstance()->state_ == NetworkStateDetails::CONNECTED;
   }
 
   // NetworkLibrary::NetworkManagerObserver implementation.