Componentize spellcheck [1]: create component and move switches there.

chrome/renderer/spellchecker/spellcheck.cc

Index: chrome/renderer/spellchecker/spellcheck.cc
diff --git a/chrome/renderer/spellchecker/spellcheck.cc b/chrome/renderer/spellchecker/spellcheck.cc
index 8df94a29c8d6a14d9a770222168558bd4f933e82..8f2bfcba24c6da9f9dbfdabd1e2c640361439e71 100644
--- a/chrome/renderer/spellchecker/spellcheck.cc
+++ b/chrome/renderer/spellchecker/spellcheck.cc
@@ -19,12 +19,12 @@
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "chrome/common/channel_info.h"
-#include "chrome/common/chrome_switches.h"
 #include "chrome/common/spellcheck_common.h"
 #include "chrome/common/spellcheck_messages.h"
 #include "chrome/common/spellcheck_result.h"
 #include "chrome/renderer/spellchecker/spellcheck_language.h"
 #include "chrome/renderer/spellchecker/spellcheck_provider.h"
+#include "components/spellcheck/common/spellcheck_switches.h"
 #include "content/public/renderer/render_thread.h"
 #include "content/public/renderer/render_view.h"
 #include "content/public/renderer/render_view_visitor.h"
@@ -540,7 +540,7 @@ void SpellCheck::CreateTextCheckingResults(
 bool SpellCheck::IsSpellcheckEnabled() {
 #if defined(OS_ANDROID)
   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
-                 switches::kEnableAndroidSpellChecker)) {
+          spellcheck::switches::kEnableAndroidSpellChecker)) {
     return false;
   }
 #endif