Move enable extensions define to a build flag.

chrome/browser/profiles/profile_io_data.cc

Index: chrome/browser/profiles/profile_io_data.cc
diff --git a/chrome/browser/profiles/profile_io_data.cc b/chrome/browser/profiles/profile_io_data.cc
index 1351f9c8efc877db0f2b8525fa5268dca974c7af..298404ce20f08912f1dd7d86cb3df1063fe754fc 100644
--- a/chrome/browser/profiles/profile_io_data.cc
+++ b/chrome/browser/profiles/profile_io_data.cc
@@ -82,6 +82,7 @@
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/resource_context.h"
 #include "content/public/common/content_switches.h"
+#include "extensions/features/features.h"
 #include "net/base/keygen_handler.h"
 #include "net/cert/cert_verifier.h"
 #include "net/cert/ct_log_verifier.h"
@@ -112,7 +113,7 @@
 #include "net/url_request/url_request_job_factory_impl.h"
 #include "third_party/WebKit/public/public_features.h"
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
 #include "chrome/browser/extensions/extension_cookie_monster_delegate.h"
 #include "chrome/browser/extensions/extension_resource_protocols.h"
 #include "extensions/browser/extension_protocols.h"
@@ -402,7 +403,7 @@ void ProfileIOData::InitializeOnUIThread(Profile* profile) {
       HostContentSettingsMapFactory::GetForProfile(profile);
   params->ssl_config_service = profile->GetSSLConfigService();
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   params->extension_info_map =
       extensions::ExtensionSystem::Get(profile)->info_map();
   params->cookie_monster_delegate = new ExtensionCookieMonsterDelegate(profile);
@@ -731,7 +732,7 @@ bool ProfileIOData::IsHandledProtocol(const std::string& scheme) {
     url::kFileScheme,
     content::kChromeDevToolsScheme,
     dom_distiller::kDomDistillerScheme,
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
     extensions::kExtensionScheme,
     extensions::kExtensionResourceScheme,
 #endif
@@ -851,7 +852,7 @@ net::URLRequestContext* ProfileIOData::GetIsolatedMediaRequestContext(
 
 extensions::InfoMap* ProfileIOData::GetExtensionInfoMap() const {
   DCHECK(initialized_) << "ExtensionSystem not initialized";
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   return extension_info_map_.get();
 #else
   return nullptr;
@@ -861,7 +862,7 @@ extensions::InfoMap* ProfileIOData::GetExtensionInfoMap() const {
 extensions::ExtensionThrottleManager*
 ProfileIOData::GetExtensionThrottleManager() const {
   DCHECK(initialized_) << "ExtensionSystem not initialized";
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   return extension_throttle_manager_.get();
 #else
   return nullptr;
@@ -1027,13 +1028,13 @@ void ProfileIOData::Init(
 
   std::unique_ptr<ChromeNetworkDelegate> network_delegate(
       new ChromeNetworkDelegate(
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
           io_thread_globals->extension_event_router_forwarder.get(),
 #else
           NULL,
 #endif
           &enable_referrers_, io_thread->GetMetricsDataUseForwarder()));
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   network_delegate->set_extension_info_map(
       profile_params_->extension_info_map.get());
   if (!command_line.HasSwitch(switches::kDisableExtensionsHttpThrottling)) {
@@ -1087,7 +1088,7 @@ void ProfileIOData::Init(
   // Take ownership over these parameters.
   cookie_settings_ = profile_params_->cookie_settings;
   host_content_settings_map_ = profile_params_->host_content_settings_map;
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   extension_info_map_ = profile_params_->extension_info_map;
 #endif
 
@@ -1189,7 +1190,7 @@ ProfileIOData::SetUpJobFactoryDefaults(
                   base::SequencedWorkerPool::SKIP_ON_SHUTDOWN)));
   DCHECK(set_protocol);
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   DCHECK(extension_info_map_.get());
   // Check only for incognito (and not Chrome OS guest mode GUEST_PROFILE).
   bool is_incognito = profile_type() == Profile::INCOGNITO_PROFILE;