Remove ENABLE_GOOGLE_NOW from the Build

BUG=459827

Change-Id: I93efa9cf7bf850326046c857121c978d8441e6c1
Reviewed-on: https://chromium-review.googlesource.com/1157486Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Robert Liao <robliao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#579640}

chrome/common/BUILD.gn

@@ -39,7 +39,6 @@ buildflag_header("buildflags") {
     "ENABLE_BACKGROUND_CONTENTS=$enable_background_contents",
     "ENABLE_BASIC_PRINT_DIALOG=$enable_basic_print_dialog",
     "ENABLE_CAPTIVE_PORTAL_DETECTION=$enable_captive_portal_detection",
-    "ENABLE_GOOGLE_NOW=$enable_google_now",
     "ENABLE_HANGOUT_SERVICES_EXTENSION=$enable_hangout_services_extension",
     "ENABLE_ONE_CLICK_SIGNIN=$enable_one_click_signin",
     "ENABLE_NATIVE_NOTIFICATIONS=$enable_native_notifications",

chrome/common/features.gni

@@ -33,10 +33,6 @@ declare_args() {
 
   enable_captive_portal_detection = !is_android && !is_chromecast
 
-  # Google Now is disabled to prepare for its removal.
-  # http://crbug.com/539674
-  enable_google_now = false
-
   # Hangout services is an extension that adds extra features to Hangouts.
   # It is enableable separately to facilitate testing.
   enable_hangout_services_extension = is_chrome_branded
@@ -81,7 +77,6 @@ chrome_grit_defines = [
   "enable_background_mode=$enable_background_mode",
   "enable_background_contents=$enable_background_contents",
   "enable_extensions=$enable_extensions",
-  "enable_google_now=$enable_google_now",
   "enable_hangout_services_extension=$enable_hangout_services_extension",
   "enable_plugins=$enable_plugins",
   "enable_print_preview=$enable_print_preview",