Add UI in Aura for distilling web pages and update Chrome Shell.

chrome/browser/ui/browser_command_controller.cc

Index: chrome/browser/ui/browser_command_controller.cc
diff --git a/chrome/browser/ui/browser_command_controller.cc b/chrome/browser/ui/browser_command_controller.cc
index d6bccf483f4d35ce9b81a1c525e828bc91af4af1..d036d1646e193cfda39830f38b0b25968329f406 100644
--- a/chrome/browser/ui/browser_command_controller.cc
+++ b/chrome/browser/ui/browser_command_controller.cc
@@ -765,6 +765,9 @@ void BrowserCommandController::ExecuteCommandWithDisposition(
     case IDC_TOGGLE_SPEECH_INPUT:
       ToggleSpeechInput(browser_);
       break;
+    case IDC_DISTILL_PAGE:
+      DistillCurrentPage(browser_);
+      break;
 
     default:
       LOG(WARNING) << "Received Unimplemented Command: " << id;
@@ -1008,6 +1011,12 @@ void BrowserCommandController::InitCommandState() {
   // Toggle speech input
   command_updater_.UpdateCommandEnabled(IDC_TOGGLE_SPEECH_INPUT, true);
 
+  // Distill current page.
+  command_updater_.UpdateCommandEnabled(
+      IDC_DISTILL_PAGE,
+      CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableDomDistiller));
+
   // Initialize other commands whose state changes based on various conditions.
   UpdateCommandsForFullscreenMode();
   UpdateCommandsForContentRestrictionState();