Rename (Host|Client)Message to Chromoting(Host|Client)Message.

remoting/base/protocol/chromotocol.proto

Index: remoting/base/protocol/chromotocol.proto
diff --git a/remoting/base/protocol/chromotocol.proto b/remoting/base/protocol/chromotocol.proto
index df510d90070944b08aed3486f1bf0bcd24a89b21..f2752d9409e2966b2501e3f0ef31da3590b7c319 100644
--- a/remoting/base/protocol/chromotocol.proto
+++ b/remoting/base/protocol/chromotocol.proto
@@ -99,7 +99,7 @@ message UpdateStreamPacketMessage {
 // Defines the message that is sent from the host to the client.
 // Only one of these messages should be present.
 // NEXT ID: 5
-message HostMessage {
+message ChromotingHostMessage {
   optional InitClientMessage init_client= 1;
   optional BeginUpdateStreamMessage begin_update_stream = 2;
   optional EndUpdateStreamMessage end_update_stream = 3;
@@ -162,7 +162,7 @@ message MouseUpEvent {
 // Defines the message that is sent from the client to the host.
 // Only one of the optional messages should be present.
 // NEXT ID: 7
-message ClientMessage {
+message ChromotingClientMessage {
   optional KeyEvent key_event = 1;
   optional MouseSetPositionEvent mouse_set_position_event = 2;
   optional MouseMoveEvent mouse_move_event = 3;