Provide access to the ID for the remoted Windows session in the network process

remoting/host/desktop_environment.h

Index: remoting/host/desktop_environment.h
diff --git a/remoting/host/desktop_environment.h b/remoting/host/desktop_environment.h
index ec984c5a4467316cf2a36673d66388f93e289093..704bec070069e41849f0bfed1b0f3d2e7f32cdcc 100644
--- a/remoting/host/desktop_environment.h
+++ b/remoting/host/desktop_environment.h
@@ -5,6 +5,7 @@
 #ifndef REMOTING_HOST_DESKTOP_ENVIRONMENT_H_
 #define REMOTING_HOST_DESKTOP_ENVIRONMENT_H_
 
+#include <cstdint>
 #include <memory>
 #include <string>
 
@@ -53,6 +54,9 @@ class DesktopEnvironment {
   // Passes the final set of capabilities negotiated between the client and host
   // to |this|.
   virtual void SetCapabilities(const std::string& capabilities) = 0;
+
+  // Returns an id which identifies the current desktop session.

[Sergey Ulanov, 2016/06/23 22:35:53]

Please make it clear that this ID is platform-specific and we don't expect it to
be set on all platforms (in which case it's UINT32_MAX)

[joedow, 2016/06/23 23:26:04]

Done.

+  virtual uint32_t GetDesktopSessionId() const = 0;
 };
 
 // Used to create |DesktopEnvironment| instances.