[SPDY] Add flag and about:flags entry for SPDY/4 alpha 1

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index 4751a141390ab201e0ba77bd8f289ae4ad4cefe7..33bc5529a11f1bc4e21a0f80dc501aa8716a6430 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -6668,6 +6668,12 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_FLAGS_ENABLE_SPDY31_DESCRIPTION" desc="Description for the flag to enable SPDY/3.1.">
         Enable experimental SPDY/3.1.
       </message>
+      <message name="IDS_FLAGS_ENABLE_SPDY4A1_NAME" desc="Title for the flag to enable SPDY/4 alpha 1">
+        Enable SPDY/4 alpha 1
+      </message>
+      <message name="IDS_FLAGS_ENABLE_SPDY4A1_DESCRIPTION" desc="Description for the flag to enable SPDY/4 alpha 1.">
+        Enable experimental SPDY/4 alpha 1. Note that this also enables SPDY/3.1.
+      </message>
       <message name="IDS_FLAGS_ENABLE_ASYNC_DNS_NAME" desc="Title for the flag to enable asynchronous DNS client.">
         Built-in Asynchronous DNS
       </message>