[NTP] Updates settings menu item to 'Chrome backgrounds'.

Change-Id: Iafb44e629fc0089c575b741c79c91c34b67959d4
Reviewed-on: https://chromium-review.googlesource.com/1112352Reviewed-by: Mathieu Perreault <mathp@chromium.org>
Commit-Queue: Ramya Nagarajan <ramyan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#569718}

chrome/app/generated_resources.grd

@@ -4881,8 +4881,8 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_NTP_CUSTOM_BG_GOOGLE_PHOTOS" desc="The text label of the Google Photos option for background customization. (On the New Tab Page)">
         Google Photos
       </message>
-      <message name="IDS_NTP_CUSTOM_BG_CHROME_WALLPAPERS" desc="The text label of the Chrome wallpapers option for background customization.(On the New Tab Page)">
-        Chrome wallpapers
+      <message name="IDS_NTP_CUSTOM_BG_CHROME_WALLPAPERS" desc="The text label of the Chrome backgrounds option for background customization.(On the New Tab Page)">
+        Chrome backgrounds
       </message>
       <message name="IDS_NTP_CUSTOM_BG_UPLOAD_AN_IMAGE" desc="The text label of the upload an image option for background customization. (On the New Tab Page)">
         Upload an image

chrome/app/generated_resources_grd/IDS_NTP_CUSTOM_BG_CHROME_WALLPAPERS.png.sha1

-63f155cb158c8a60ad6d0241cbccea801d0e77f1
+e043dccf666255df4ea5d87b63a496ddfb90d47d
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