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

remoting/host/host_port_allocator.cc

Index: remoting/host/host_port_allocator.cc
diff --git a/remoting/host/host_port_allocator.cc b/remoting/host/host_port_allocator.cc
index ba53322b4e439e79cdf641cd0fd69ce8a947b764..cf8a84c00e0eba218003b6457d0c79ca9ecf200f 100644
--- a/remoting/host/host_port_allocator.cc
+++ b/remoting/host/host_port_allocator.cc
@@ -59,11 +59,16 @@ HostPortAllocatorSession::HostPortAllocatorSession(
     const std::vector<std::string>& relay_hosts,
     const std::string& relay,
     const scoped_refptr<net::URLRequestContextGetter>& url_context)
-    : HttpPortAllocatorSessionBase(
-        allocator, content_name, component, ice_username_fragment, ice_password,
-        stun_hosts, relay_hosts, relay, ""),
-      url_context_(url_context) {
-}
+    : HttpPortAllocatorSessionBase(allocator,
+                                   content_name,
+                                   component,
+                                   ice_username_fragment,
+                                   ice_password,
+                                   stun_hosts,
+                                   relay_hosts,
+                                   relay,
+                                   std::string()),
+      url_context_(url_context) {}
 
 HostPortAllocatorSession::~HostPortAllocatorSession() {
   STLDeleteElements(&url_fetchers_);
@@ -157,11 +162,12 @@ HostPortAllocator::HostPortAllocator(
     const scoped_refptr<net::URLRequestContextGetter>& url_context,
     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()),
       url_context_(url_context),
       network_manager_(network_manager.Pass()),
-      socket_factory_(socket_factory.Pass()) {
-}
+      socket_factory_(socket_factory.Pass()) {}
 
 HostPortAllocator::~HostPortAllocator() {
 }