Update strings for the extensions menu

These strings aren't necessarily final but are probably closer to what
we want. Putting these in so that we can get a better feel for them.

Bug: chromium:943702
Change-Id: I2a003a8f85c87d3e3c3a15e1283be7cc9ea5ad7f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1894769
Commit-Queue: Peter Boström <pbos@chromium.org>
Commit-Queue: Caroline Rising <corising@chromium.org>
Auto-Submit: Peter Boström <pbos@chromium.org>
Reviewed-by: Caroline Rising <corising@chromium.org>
Cr-Commit-Position: refs/heads/master@{#711952}

chrome/app/generated_resources.grd

@@ -4439,13 +4439,13 @@ Keep your key file in a safe place. You will need it to create new versions of y
         Unpin extension
       </message>
       <message name="IDS_EXTENSIONS_MENU_ACCESSING_SITE_DATA" desc="Header for section of extensions that are able to access the current site's data">
-        Accessing this site's data
+        These extensions can see and change information on this site.
       </message>
       <message name="IDS_EXTENSIONS_MENU_WANTS_TO_ACCESS_SITE_DATA" desc="Header for section of extensions that want to access the current site's data">
-        Wants to access this site's data
+        To allow access on this site, click the extension.
       </message>
       <message name="IDS_EXTENSIONS_MENU_CANT_ACCESS_SITE_DATA" desc="Header for section of extensions that can't access the current site's data">
-        Can't access this site's data
+        These extensions don't need access to this site.
       </message>
 
       <!-- Settings API bubble -->

chrome/browser/ui/views/extensions/extensions_menu_view.cc

@@ -164,6 +164,7 @@ ExtensionsMenuView::CreateExtensionButtonsContainer() {
             l10n_util::GetStringUTF16(label_string_id),
             ChromeTextContext::CONTEXT_BODY_TEXT_LARGE,
             views::style::STYLE_SECONDARY);
+        label->SetMultiLine(true);
         label->SetHorizontalAlignment(gfx::ALIGN_LEFT);
         const int horizontal_spacing =
             ChromeLayoutProvider::Get()->GetDistanceMetric(