Adding DRP specfic UMA for FirstContentfulPaint

content/common/frame_messages.h

Index: content/common/frame_messages.h
diff --git a/content/common/frame_messages.h b/content/common/frame_messages.h
index ec76ea6950d62b451a19389e8e6763731af5b312..88af1d3a1ab990b46a557dc073ed7e6e0bc243ab 100644
--- a/content/common/frame_messages.h
+++ b/content/common/frame_messages.h
@@ -283,20 +283,26 @@ IPC_STRUCT_BEGIN_WITH_PARENT(FrameHostMsg_DidCommitProvisionalLoad_Params,
 
   // Timestamp at which the UI action that triggered the navigation originated.
   IPC_STRUCT_MEMBER(base::TimeTicks, ui_timestamp)
 
   // True if the document for the load is enforcing strict mixed content
   // checking.
   IPC_STRUCT_MEMBER(bool, should_enforce_strict_mixed_content_checking)
 
   // True if the navigation originated as an srcdoc attribute.
   IPC_STRUCT_MEMBER(bool, is_srcdoc)
+
+  // True if LoFi was on for this navigation.
+  IPC_STRUCT_MEMBER(bool, is_using_lofi)
+
+  // True if the navigation was proxied through data reduction proxy.
+  IPC_STRUCT_MEMBER(bool, used_data_reduction_proxy)
 IPC_STRUCT_END()
 
 IPC_STRUCT_BEGIN(FrameMsg_PostMessage_Params)
   // Whether the data format is supplied as serialized script value, or as
   // a simple string. If it is a raw string, must be converted from string to a
   // WebSerializedScriptValue in the renderer process.
   IPC_STRUCT_MEMBER(bool, is_data_raw_string)
 
   // The serialized script value.
   IPC_STRUCT_MEMBER(base::string16, data)