Move enable extensions define to a build flag.

chrome/test/base/chrome_render_view_test.cc

Index: chrome/test/base/chrome_render_view_test.cc
diff --git a/chrome/test/base/chrome_render_view_test.cc b/chrome/test/base/chrome_render_view_test.cc
index 94eb0274ecd31480288eaa51bf75a4d9f02c895d..1e3cb364115417cca4fb1824965c91da0ca38ed2 100644
--- a/chrome/test/base/chrome_render_view_test.cc
+++ b/chrome/test/base/chrome_render_view_test.cc
@@ -20,6 +20,7 @@
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "content/public/common/renderer_preferences.h"
 #include "content/public/renderer/render_view.h"
+#include "extensions/features/features.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "third_party/WebKit/public/platform/WebURLRequest.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
@@ -29,7 +30,7 @@
 #include "third_party/WebKit/public/web/WebScriptSource.h"
 #include "third_party/WebKit/public/web/WebView.h"
 
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
 #include "chrome/renderer/extensions/chrome_extensions_dispatcher_delegate.h"
 #include "chrome/renderer/extensions/chrome_extensions_renderer_client.h"
 #include "extensions/browser/extension_function_dispatcher.h"
@@ -128,7 +129,7 @@ void ChromeRenderViewTest::SetUp() {
 
 void ChromeRenderViewTest::TearDown() {
   base::RunLoop().RunUntilIdle();
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   ChromeExtensionsRendererClient* ext_client =
       ChromeExtensionsRendererClient::GetInstance();
   ext_client->GetExtensionDispatcherForTest()->OnRenderProcessShutdown();
@@ -162,7 +163,7 @@ void ChromeRenderViewTest::RegisterMainFrameRemoteInterfaces() {}
 
 void ChromeRenderViewTest::InitChromeContentRendererClient(
     ChromeContentRendererClient* client) {
-#if defined(ENABLE_EXTENSIONS)
+#if BUILDFLAG(ENABLE_EXTENSIONS)
   extension_dispatcher_delegate_.reset(
       new ChromeExtensionsDispatcherDelegate());
   ChromeExtensionsRendererClient* ext_client =