Make SpellCheckPanel compiled and used only on Mac

components/spellcheck/renderer/spellcheck_panel.cc

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/spellcheck/renderer/spellcheck_panel.h"
 
 #include "base/metrics/histogram_macros.h"
 #include "components/spellcheck/common/spellcheck_messages.h"
 #include "content/public/renderer/render_view.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "third_party/WebKit/public/web/WebView.h"
 
 using blink::WebString;
 
 SpellCheckPanel::SpellCheckPanel(content::RenderView* render_view)
     : content::RenderViewObserver(render_view),
       content::RenderViewObserverTracker<SpellCheckPanel>(render_view),
       spelling_panel_visible_(false) {
   render_view->GetWebView()->SetSpellCheckClient(this);
 }
 
 SpellCheckPanel::~SpellCheckPanel() = default;
 
 void SpellCheckPanel::ShowSpellingUI(bool show) {
-#if BUILDFLAG(USE_BROWSER_SPELLCHECKER)
   UMA_HISTOGRAM_BOOLEAN("SpellCheck.api.showUI", show);
   Send(new SpellCheckHostMsg_ShowSpellingPanel(routing_id(), show));
-#endif
 }
 
 bool SpellCheckPanel::IsShowingSpellingUI() {
   return spelling_panel_visible_;
 }
 
 void SpellCheckPanel::UpdateSpellingUIWithMisspelledWord(
     const WebString& word) {
-#if BUILDFLAG(USE_BROWSER_SPELLCHECKER)
   Send(new SpellCheckHostMsg_UpdateSpellingPanelWithMisspelledWord(
       routing_id(), word.Utf16()));
-#endif
 }
 
 bool SpellCheckPanel::OnMessageReceived(const IPC::Message& message) {
-#if !BUILDFLAG(USE_BROWSER_SPELLCHECKER)
-  return false;
-#endif
-#if BUILDFLAG(USE_BROWSER_SPELLCHECKER)
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(SpellCheckPanel, message)
     IPC_MESSAGE_HANDLER(SpellCheckMsg_AdvanceToNextMisspelling,
                         OnAdvanceToNextMisspelling)
     IPC_MESSAGE_HANDLER(SpellCheckMsg_ToggleSpellPanel, OnToggleSpellPanel)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
-#endif
 }
 
-#if BUILDFLAG(USE_BROWSER_SPELLCHECKER)
 void SpellCheckPanel::OnAdvanceToNextMisspelling() {
   if (!render_view()->GetWebView())
     return;
   render_view()->GetWebView()->FocusedFrame()->ExecuteCommand(
       WebString::FromUTF8("AdvanceToNextMisspelling"));
 }
 
 void SpellCheckPanel::OnToggleSpellPanel(bool is_currently_visible) {
   if (!render_view()->GetWebView())
     return;
   // We need to tell the webView whether the spelling panel is visible or not so
   // that it won't need to make ipc calls later.
   spelling_panel_visible_ = is_currently_visible;
   render_view()->GetWebView()->FocusedFrame()->ExecuteCommand(
       WebString::FromUTF8("ToggleSpellPanel"));
 }
-#endif
 
 void SpellCheckPanel::OnDestruct() {
   delete this;
 }