Convert spellcheck to a buildflag header.

components/spellcheck/renderer/spellcheck_provider.cc

Index: components/spellcheck/renderer/spellcheck_provider.cc
diff --git a/components/spellcheck/renderer/spellcheck_provider.cc b/components/spellcheck/renderer/spellcheck_provider.cc
index f52fe596705c94e675d860375170502247e45779..bd91fc57664670af07885ea74db512df75b5baa7 100644
--- a/components/spellcheck/renderer/spellcheck_provider.cc
+++ b/components/spellcheck/renderer/spellcheck_provider.cc
@@ -11,6 +11,7 @@
 #include "components/spellcheck/common/spellcheck_result.h"
 #include "components/spellcheck/renderer/spellcheck.h"
 #include "components/spellcheck/renderer/spellcheck_language.h"
+#include "components/spellcheck/spellcheck_build_features.h"
 #include "content/public/renderer/render_view.h"
 #include "third_party/WebKit/public/platform/WebVector.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
@@ -72,7 +73,7 @@ void SpellCheckProvider::RequestTextChecking(
   last_request_.clear();
   last_results_.assign(blink::WebVector<blink::WebTextCheckingResult>());
 
-#if defined(USE_BROWSER_SPELLCHECKER)
+#if BUILDFLAG(USE_BROWSER_SPELLCHECKER)
   // Text check (unified request for grammar and spell check) is only
   // available for browser process, so we ask the system spellchecker
   // over IPC or return an empty result if the checker is not
@@ -94,11 +95,11 @@ void SpellCheckProvider::RequestTextChecking(
 bool SpellCheckProvider::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(SpellCheckProvider, message)
-#if !defined(USE_BROWSER_SPELLCHECKER)
+#if !BUILDFLAG(USE_BROWSER_SPELLCHECKER)
     IPC_MESSAGE_HANDLER(SpellCheckMsg_RespondSpellingService,
                         OnRespondSpellingService)
 #endif
-#if defined(USE_BROWSER_SPELLCHECKER)
+#if BUILDFLAG(USE_BROWSER_SPELLCHECKER)
     IPC_MESSAGE_HANDLER(SpellCheckMsg_AdvanceToNextMisspelling,
                         OnAdvanceToNextMisspelling)
     IPC_MESSAGE_HANDLER(SpellCheckMsg_RespondTextCheck, OnRespondTextCheck)
@@ -110,7 +111,7 @@ bool SpellCheckProvider::OnMessageReceived(const IPC::Message& message) {
 }
 
 void SpellCheckProvider::FocusedNodeChanged(const blink::WebNode& unused) {
-#if defined(USE_BROWSER_SPELLCHECKER)
+#if BUILDFLAG(USE_BROWSER_SPELLCHECKER)
   WebLocalFrame* frame = render_view()->GetWebView()->focusedFrame();
   WebElement element = frame->document().isNull() ? WebElement() :
       frame->document().focusedElement();
@@ -166,7 +167,7 @@ void SpellCheckProvider::cancelAllPendingRequests() {
 }
 
 void SpellCheckProvider::showSpellingUI(bool show) {
-#if defined(USE_BROWSER_SPELLCHECKER)
+#if BUILDFLAG(USE_BROWSER_SPELLCHECKER)
   UMA_HISTOGRAM_BOOLEAN("SpellCheck.api.showUI", show);
   Send(new SpellCheckHostMsg_ShowSpellingPanel(routing_id(), show));
 #endif
@@ -178,13 +179,13 @@ bool SpellCheckProvider::isShowingSpellingUI() {
 
 void SpellCheckProvider::updateSpellingUIWithMisspelledWord(
     const WebString& word) {
-#if defined(USE_BROWSER_SPELLCHECKER)
+#if BUILDFLAG(USE_BROWSER_SPELLCHECKER)
   Send(new SpellCheckHostMsg_UpdateSpellingPanelWithMisspelledWord(routing_id(),
                                                                    word));
 #endif
 }
 
-#if !defined(USE_BROWSER_SPELLCHECKER)
+#if !BUILDFLAG(USE_BROWSER_SPELLCHECKER)
 void SpellCheckProvider::OnRespondSpellingService(
     int identifier,
     bool succeeded,
@@ -233,7 +234,7 @@ bool SpellCheckProvider::HasWordCharacters(
   return false;
 }
 
-#if defined(USE_BROWSER_SPELLCHECKER)
+#if BUILDFLAG(USE_BROWSER_SPELLCHECKER)
 void SpellCheckProvider::OnAdvanceToNextMisspelling() {
   if (!render_view()->GetWebView())
     return;