[Android] Add AndroidSpellChecker feature to allow for gradual rollout using finch.

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index 052e416edc16625d2124eea434a349cd12d68c35..c010633690ee7650f54383e835af6b4b5d20b89e 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -134,7 +134,6 @@
 #include "components/rappor/rappor_utils.h"
 #include "components/security_interstitials/core/ssl_error_ui.h"
 #include "components/signin/core/common/profile_management_switches.h"
-#include "components/spellcheck/common/spellcheck_switches.h"
 #include "components/startup_metric_utils/browser/startup_metric_host_impl.h"
 #include "components/subresource_filter/content/browser/content_subresource_filter_driver_factory.h"
 #include "components/subresource_filter/content/browser/subresource_filter_navigation_throttle.h"
@@ -1642,9 +1641,6 @@ void ChromeContentBrowserClient::AppendExtraCommandLineSwitches(
       switches::kDisableCastStreamingHWEncoding,
       switches::kDisableJavaScriptHarmonyShipping,
       switches::kDisableNewBookmarkApps,
-#if defined(ENABLE_SPELLCHECK) && defined(OS_ANDROID)
-      spellcheck::switches::kEnableAndroidSpellChecker,
-#endif
       switches::kEnableBenchmarking,
       switches::kEnableNaCl,
 #if !defined(DISABLE_NACL)