[Sync] Make SESSIONS an implicit type

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 668a2789e1fc70e07a84a26ccbce33017cae4b19..530dd893245d267dee8db4b8c2cf1d138a562c7e 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -6495,10 +6495,10 @@ Keep your key file in a safe place. You will need it to create new versions of y
       </if>
       <if expr="not pp_ifdef('android')">
         <message name="IDS_FLAGS_SYNC_TYPED_URLS_NAME" desc="Title for the flag to enable syncing the TypedUrl datatype">
-          Enable syncing Omnibox History
+          Enable syncing History
         </message>
         <message name="IDS_FLAGS_SYNC_TYPED_URLS_DESCRIPTION" desc="Description for the flag to enable syncing the TypedURL datatype">
-          Enable Omnibox History in the sync settings. This allows syncing your typed URL history to other clients to assist in omnibox auto-completion.
+          Enable History in the sync settings. This allows syncing your typed URL history and navigation history to other clients to assist in omnibox auto-completion and the history UI.
         </message>
       </if>
       <message name="IDS_FLAGS_OMNIBOX_HISTORY_QUICK_PROVIDER_NEW_SCORING_NAME" desc="Title for the flag for omnibox to use new scoring function in HistoryQuickProvider when ranking suggestions">
@@ -13735,8 +13735,8 @@ Some features may be unavailable.  Please check that the profile exists and you
       <message name="IDS_SYNC_DATATYPE_PASSWORDS" desc="Saved passwords, one of the data types that we allow syncing.">
         Passwords
       </message>
-      <message name="IDS_SYNC_DATATYPE_TYPED_URLS" desc="Typed URLs, one of the data types that we allow syncing.">
-        Omnibox History
+      <message name="IDS_SYNC_DATATYPE_TYPED_URLS" desc="History, one of the data types that we allow syncing.">
+        History
       </message>
       <message name="IDS_SYNC_DATATYPE_APPS" desc="Apps, one of the data types that we allow syncing.">
         Apps