MD Extensions: Replace toolbar/search field with cr-toolbar

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 c4ce7e3b2c8a4940b98074cd14ed9bca2dbec555..f9f2a0faca46ecb271f48b7c5ce4e6dc0cf7ed0d 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -4600,7 +4600,10 @@ Data associated with this app will be removed from this device.
           Extensions & Apps
         </message>
         <message name="IDS_MD_EXTENSIONS_SEARCH" desc="The text displayed in the search box on the chrome://extensions page.">
-          Search
+          Search extensions
+        </message>
+        <message name="IDS_MD_EXTENSIONS_CLEAR_SEARCH" desc="The label of the button to clear text from the search box on the chrome://extensions page.">
+          Clear search

[dpapad, 2016/11/29 23:34:59]

We have a copy of that string for downloads, history and now extensions.
Settings is re-using the downloads one, see
https://cs.chromium.org/chromium/src/chrome/browser/ui/webui/settings/md_sett...
(and TODO). Can you simply re-use one of the existing ones for now?

[tsergeant, 2016/11/30 00:40:29]

Done. I've used the string from downloads and added a TODO here too.

         </message>
         <message name="IDS_MD_EXTENSIONS_SHORTCUT_NOT_SET" desc="The label to indicate that an extension has no shortcut set for a given command.">
           Not set