Move enable extensions define to a build flag.

chrome/browser/nacl_host/nacl_browser_delegate_impl.cc

Index: chrome/browser/nacl_host/nacl_browser_delegate_impl.cc
diff --git a/chrome/browser/nacl_host/nacl_browser_delegate_impl.cc b/chrome/browser/nacl_host/nacl_browser_delegate_impl.cc
index add454fc297f09d9a33fc00d281e02c473d644ca..b971070b744bdff3700a534d9b6e18f70ff5aa3e 100644
--- a/chrome/browser/nacl_host/nacl_browser_delegate_impl.cc
+++ b/chrome/browser/nacl_host/nacl_browser_delegate_impl.cc
@@ -13,9 +13,6 @@
 #include "base/strings/string_split.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/component_updater/pnacl_component_installer.h"
-#if defined(ENABLE_EXTENSIONS)
-#include "chrome/browser/extensions/extension_service.h"
-#endif
 #include "chrome/browser/nacl_host/nacl_infobar_delegate.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
@@ -26,7 +23,11 @@
 #include "chrome/common/logging_chrome.h"
 #include "chrome/common/pepper_permission_util.h"
 #include "content/public/browser/browser_thread.h"
-#if defined(ENABLE_EXTENSIONS)
+#include "extensions/features/features.h"
+#include "url/gurl.h"
+
+#if BUILDFLAG(ENABLE_EXTENSIONS)
+#include "chrome/browser/extensions/extension_service.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/browser/info_map.h"
 #include "extensions/browser/process_manager.h"
@@ -34,7 +35,6 @@
 #include "extensions/common/extension.h"
 #include "extensions/common/url_pattern.h"
 #endif
-#include "url/gurl.h"
 
 namespace {
 
@@ -70,7 +70,7 @@ void OnKeepaliveOnUIThread(
   if (instance_data.size() < 1)
     return;
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   extensions::ProcessManager::OnKeepaliveFromPlugin(
       instance_data[0].render_process_id,
       instance_data[0].render_frame_id,
@@ -146,7 +146,7 @@ ppapi::host::HostFactory* NaClBrowserDelegateImpl::CreatePpapiHostFactory(
 
 void NaClBrowserDelegateImpl::SetDebugPatterns(
     const std::string& debug_patterns) {
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   if (debug_patterns.empty()) {
     return;
   }
@@ -176,12 +176,12 @@ void NaClBrowserDelegateImpl::SetDebugPatterns(
       debug_patterns_.push_back(pattern);
     }
   }
-#endif  // defined(ENABLE_EXTENSIONS)
+#endif  // BUILDFLAG(ENABLE_EXTENSIONS)
 }
 
 bool NaClBrowserDelegateImpl::URLMatchesDebugPatterns(
     const GURL& manifest_url) {
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   // Empty patterns are forbidden so we ignore them.
   if (debug_patterns_.empty()) {
     return true;
@@ -201,7 +201,7 @@ bool NaClBrowserDelegateImpl::URLMatchesDebugPatterns(
   }
 #else
   return false;
-#endif  // defined(ENABLE_EXTENSIONS)
+#endif  // BUILDFLAG(ENABLE_EXTENSIONS)
 }
 
 // This function is security sensitive.  Be sure to check with a security
@@ -211,7 +211,7 @@ bool NaClBrowserDelegateImpl::MapUrlToLocalFilePath(
     bool use_blocking_api,
     const base::FilePath& profile_directory,
     base::FilePath* file_path) {
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   scoped_refptr<extensions::InfoMap> extension_info_map =
       GetExtensionInfoMap(profile_directory);
   return extension_info_map->MapUrlToLocalFilePath(
@@ -229,7 +229,7 @@ NaClBrowserDelegateImpl::GetOnKeepaliveCallback() {
 bool NaClBrowserDelegateImpl::IsNonSfiModeAllowed(
     const base::FilePath& profile_directory,
     const GURL& manifest_url) {
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   const extensions::ExtensionSet* extension_set =
       &GetExtensionInfoMap(profile_directory)->extensions();
   return chrome::IsExtensionOrSharedModuleWhitelisted(
@@ -239,7 +239,7 @@ bool NaClBrowserDelegateImpl::IsNonSfiModeAllowed(
 #endif
 }
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
 scoped_refptr<extensions::InfoMap> NaClBrowserDelegateImpl::GetExtensionInfoMap(
     const base::FilePath& profile_directory) {
   // Get the profile associated with the renderer.