Implement the new Sync Confirmation dialog on Linux and Windows.

This CL mostly implements the sync confirmation dialog that is shown at
the end of the tab modal signin flow described in the associated bug. It
allows the user to make an explicit decision about starting sync before
it's started and before sign in is completed.

TEST=
1. Enable the --enable-password-separated-signin-flow flag in
   chrome://flags and restart Chrome
2. In a non-signed in Chrome Profile, select "Sign in to Chrome" from
   the User Menu.
3. Enter valid credentials to sign in to Chrome, the sign in window
   should close and the sync confirmation window should be shown
4. From that window, clicking "Got it" should close the window and leave
   the user signed in with sync started. Clicking "Undo" should close
   the window and leave the user signed out with sync not started.

BUG=533004

Review URL: https://codereview.chromium.org/1487283005

Cr-Commit-Position: refs/heads/master@{#371907}
diff --git a/chrome/browser/browser_resources.grd b/chrome/browser/browser_resources.grd
index 491be54..bbfa598f 100644
--- a/chrome/browser/browser_resources.grd
+++ b/chrome/browser/browser_resources.grd
@@ -325,6 +325,9 @@
       <include name="IDR_SITE_ENGAGEMENT_ENGAGEMENT_TABLE_CSS" file="resources\engagement\engagement_table.css" type="BINDATA" />
       <include name="IDR_SITE_ENGAGEMENT_ENGAGEMENT_TABLE_HTML" file="resources\engagement\engagement_table.html" type="BINDATA" />
       <include name="IDR_SITE_ENGAGEMENT_ENGAGEMENT_TABLE_JS" file="resources\engagement\engagement_table.js" type="BINDATA" />
+      <include name="IDR_SYNC_CONFIRMATION_CSS" file="resources\sync_confirmation\sync_confirmation.css" type="BINDATA" />
+      <include name="IDR_SYNC_CONFIRMATION_HTML" file="resources\sync_confirmation\sync_confirmation.html" allowexternalscript="true" type="BINDATA" />
+      <include name="IDR_SYNC_CONFIRMATION_JS" file="resources\sync_confirmation\sync_confirmation.js" type="BINDATA" />
       <include name="IDR_UBER_HTML" file="resources\uber\uber.html" flattenhtml="true" type="BINDATA" />
       <include name="IDR_UBER_JS" file="resources\uber\uber.js" type="BINDATA" />
       <include name="IDR_UBER_FRAME_HTML" file="resources\uber\uber_frame.html" flattenhtml="true" type="BINDATA" />