Consistently use LoFi for an entire page

net/url_request/url_request.h

Index: net/url_request/url_request.h
diff --git a/net/url_request/url_request.h b/net/url_request/url_request.h
index f9b109e1a241d3af9c4582fde3bfc5da3ac96e16..2cc7aa7b91c76495ada21c7251426bf5c220f356 100644
--- a/net/url_request/url_request.h
+++ b/net/url_request/url_request.h
@@ -62,6 +62,17 @@ class X509Certificate;
 // excluding the "Set-Cookie:" part.
 typedef std::vector<std::string> ResponseCookies;
 
+// The LoFi state which determines whether to add the LoFi header. Must stay
+// in sync with the enum in navigation_params.h.
+enum LoFiState {
+  // Request a LoFi version of the resource.
+  LOFI_ON = 0,
+  // Request a normal (non-LoFi) version of the resource.
+  LOFI_OFF,
+  // Let the browser process decide whether or not to request the LoFi version.
+  LOFI_DEFAULT,
+};
+
 //-----------------------------------------------------------------------------
 // A class  representing the asynchronous load of a data stream from an URL.
 //
@@ -300,6 +311,11 @@ class NET_EXPORT URLRequest : NON_EXPORTED_BASE(public base::NonThreadSafe),
   // and it is permissible for it to be null.
   void set_delegate(Delegate* delegate);
 
+  // Whether or not to request a LoFi version of the resource or let the
+  // browser decide.
+  LoFiState lofi_state() const { return lofi_state_; }
+  void set_lofi_state(LoFiState lofi_state);
+
   // Indicates that the request body should be sent using chunked transfer
   // encoding. This method may only be called before Start() is called.
   void EnableChunkedUpload();
@@ -838,6 +854,10 @@ class NET_EXPORT URLRequest : NON_EXPORTED_BASE(public base::NonThreadSafe),
 
   scoped_ptr<const base::debug::StackTrace> stack_trace_;
 
+  // Whether or not to request a LoFi version of the resource or let the
+  // browser decide.
+  LoFiState lofi_state_;
+
   DISALLOW_COPY_AND_ASSIGN(URLRequest);
 };