blimp: Add settings to allow the client to download the whole page.

blimp/common/proto/blimp_message.proto

Index: blimp/common/proto/blimp_message.proto
diff --git a/blimp/common/proto/blimp_message.proto b/blimp/common/proto/blimp_message.proto
index db73e03c5a1a29863793fe70a85c022d516e76ba..a6021e35e86848b161d4a44c729429bc5736b928 100644
--- a/blimp/common/proto/blimp_message.proto
+++ b/blimp/common/proto/blimp_message.proto
@@ -28,6 +28,7 @@ import "input.proto";
 import "navigation.proto";
 import "render_widget.proto";
 import "protocol_control.proto";
+import "settings.proto";
 import "tab_control.proto";
 
 package blimp;
@@ -41,6 +42,7 @@ message BlimpMessage {
     INPUT = 4;
     COMPOSITOR = 5;
     PROTOCOL_CONTROL = 6;
+    SETTINGS = 7;
   }
 
   // Sequence number of this message, used for message acknowledgement.
@@ -74,5 +76,6 @@ message BlimpMessage {
   optional InputMessage input = 1003;
   optional CompositorMessage compositor = 1004;
   optional ProtocolControlMessage protocol_control = 1005;
+  optional SettingsMessage settings = 1006;
 }