[Remoting iOS] Basic viewport manipulation support

remoting/client/ios/session/remoting_client.h

Index: remoting/client/ios/session/remoting_client.h
diff --git a/remoting/client/ios/session/remoting_client.h b/remoting/client/ios/session/remoting_client.h
index 900a346e70df716789d807519ed1b18dad3b2330..a879bf6f85a069690b31989d263f250eec933f5e 100644
--- a/remoting/client/ios/session/remoting_client.h
+++ b/remoting/client/ios/session/remoting_client.h
@@ -9,6 +9,12 @@
 
 #include "remoting/protocol/connection_to_host.h"
 
+namespace remoting {
+
+class GestureInterpreter;
+
+}  // namespace remoting
+
 @class HostInfo;
 @class GlDisplayHandler;
 
@@ -59,6 +65,10 @@ extern NSString* const kHostSessionPin;
 @property(nonatomic, strong) GlDisplayHandler* displayHandler;
 // The host info used to make the remoting client connection.
 @property(nonatomic, readonly) HostInfo* hostInfo;
+// The gesture interpreter used to handle gestures.
+// This is valid only after the client has connected to the host. Always use
+// RemotingClient.gestureInterpreter instead of storing the pointer separately.
+@property(nonatomic, readonly) remoting::GestureInterpreter* gestureInterpreter;
 
 @end