Rewrite std::string("") to std::string(), Linux edition.

remoting/client/plugin/pepper_port_allocator.cc

Index: remoting/client/plugin/pepper_port_allocator.cc
diff --git a/remoting/client/plugin/pepper_port_allocator.cc b/remoting/client/plugin/pepper_port_allocator.cc
index 62a5822e9a1e4fa90cdeb390a991bd959e0fd686..423102a0d75fb910a14aef1d7e0029a16d85364d 100644
--- a/remoting/client/plugin/pepper_port_allocator.cc
+++ b/remoting/client/plugin/pepper_port_allocator.cc
@@ -82,9 +82,15 @@ PepperPortAllocatorSession::PepperPortAllocatorSession(
     const std::vector<std::string>& relay_hosts,
     const std::string& relay_token,
     const pp::InstanceHandle& instance)
-    : HttpPortAllocatorSessionBase(
-        allocator, content_name, component, ice_username_fragment, ice_password,
-        stun_hosts, relay_hosts, relay_token, ""),
+    : HttpPortAllocatorSessionBase(allocator,
+                                   content_name,
+                                   component,
+                                   ice_username_fragment,
+                                   ice_password,
+                                   stun_hosts,
+                                   relay_hosts,
+                                   relay_token,
+                                   std::string()),
       instance_(instance),
       stun_address_resolver_(instance_),
       stun_port_(0),
@@ -129,7 +135,7 @@ void PepperPortAllocatorSession::GetPortConfigurations() {
   // Add an empty configuration synchronously, so a local connection
   // can be started immediately.
   ConfigReady(new cricket::PortConfiguration(
-      talk_base::SocketAddress(), "", ""));
+      talk_base::SocketAddress(), std::string(), std::string()));
 
   ResolveStunServerAddress();
   TryCreateRelaySession();
@@ -195,7 +201,8 @@ void PepperPortAllocatorSession::OnStunAddressResolved(int32_t result) {
     ReceiveSessionResponse(std::string(relay_response_body_.begin(),
                                        relay_response_body_.end()));
   } else {
-    ConfigReady(new cricket::PortConfiguration(stun_address_, "", ""));
+    ConfigReady(new cricket::PortConfiguration(
+        stun_address_, std::string(), std::string()));
   }
 }
 
@@ -304,7 +311,9 @@ PepperPortAllocator::PepperPortAllocator(
     const pp::InstanceHandle& instance,
     scoped_ptr<talk_base::NetworkManager> network_manager,
     scoped_ptr<talk_base::PacketSocketFactory> socket_factory)
-    : HttpPortAllocatorBase(network_manager.get(), socket_factory.get(), ""),
+    : HttpPortAllocatorBase(network_manager.get(),
+                            socket_factory.get(),
+                            std::string()),
       instance_(instance),
       network_manager_(network_manager.Pass()),
       socket_factory_(socket_factory.Pass()) {