Move enable extensions define to a build flag.

chrome/browser/ui/browser_commands.cc

Index: chrome/browser/ui/browser_commands.cc
diff --git a/chrome/browser/ui/browser_commands.cc b/chrome/browser/ui/browser_commands.cc
index c612bc7f27494e29f8092bdf71b258ac17763e77..89f35b6ecb9be583578c026861e89727d203965e 100644
--- a/chrome/browser/ui/browser_commands.cc
+++ b/chrome/browser/ui/browser_commands.cc
@@ -83,11 +83,12 @@
 #include "content/public/common/url_constants.h"
 #include "content/public/common/url_utils.h"
 #include "content/public/common/user_agent.h"
+#include "extensions/features/features.h"
 #include "net/base/escape.h"
 #include "printing/features/features.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
 #include "chrome/browser/extensions/api/commands/command_service.h"
 #include "chrome/browser/extensions/api/extension_action/extension_action_api.h"
 #include "chrome/browser/extensions/tab_helper.h"
@@ -143,7 +144,7 @@ bool CanBookmarkCurrentPageInternal(const Browser* browser,
            !chrome::ShouldRemoveBookmarkThisPageUI(browser->profile()));
 }
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
 bool GetBookmarkOverrideCommand(
     Profile* profile,
     const extensions::Extension** extension,
@@ -457,7 +458,7 @@ void Home(Browser* browser, WindowOpenDisposition disposition) {
 
   GURL url = browser->profile()->GetHomePage();
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   // With bookmark apps enabled, hosted apps should return to their launch page
   // when the home button is pressed.
   if (browser->is_app()) {
@@ -523,7 +524,7 @@ void OpenCurrentURL(Browser* browser) {
       TabStripModel::ADD_FORCE_INDEX | TabStripModel::ADD_INHERIT_OPENER;
   Navigate(&params);
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   DCHECK(extensions::ExtensionSystem::Get(
       browser->profile())->extension_service());
   const extensions::Extension* extension =
@@ -762,7 +763,7 @@ void BookmarkCurrentPageIgnoringExtensionOverrides(Browser* browser) {
 void BookmarkCurrentPageAllowingExtensionOverrides(Browser* browser) {
   DCHECK(!chrome::ShouldRemoveBookmarkThisPageUI(browser->profile()));
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   const extensions::Extension* extension = NULL;
   extensions::Command command;
   extensions::CommandService::ExtensionCommandType command_type;
@@ -1258,7 +1259,7 @@ bool CanViewSource(const Browser* browser) {
           CanViewSource();
 }
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
 void CreateApplicationShortcuts(Browser* browser) {
   content::RecordAction(UserMetricsAction("CreateShortcut"));
   extensions::TabHelper::FromWebContents(
@@ -1302,6 +1303,6 @@ void ConvertTabToAppWindow(Browser* browser,
   contents->GetRenderViewHost()->SyncRendererPrefs();
   app_browser->window()->Show();
 }
-#endif  // defined(ENABLE_EXTENSIONS)
+#endif  // BUILDFLAG(ENABLE_EXTENSIONS)
 
 }  // namespace chrome