Cleanup: Only build extensions renderer code when extensions are enabled.

chrome/renderer/chrome_content_renderer_client.cc

Index: chrome/renderer/chrome_content_renderer_client.cc
diff --git a/chrome/renderer/chrome_content_renderer_client.cc b/chrome/renderer/chrome_content_renderer_client.cc
index fa73f7ba1235869ebc196e3f1da289c184b1e772..9ce12cbf943aed542fe4cddbf5708f5578aed92b 100644
--- a/chrome/renderer/chrome_content_renderer_client.cc
+++ b/chrome/renderer/chrome_content_renderer_client.cc
@@ -35,7 +35,6 @@
 #include "chrome/renderer/chrome_render_process_observer.h"
 #include "chrome/renderer/chrome_render_view_observer.h"
 #include "chrome/renderer/content_settings_observer.h"
-#include "chrome/renderer/extensions/chrome_extensions_renderer_client.h"
 #include "chrome/renderer/external_extension.h"
 #include "chrome/renderer/loadtimes_extension_bindings.h"
 #include "chrome/renderer/media/cast_ipc_dispatcher.h"
@@ -116,6 +115,7 @@
 #if defined(ENABLE_EXTENSIONS)
 #include "chrome/renderer/extensions/chrome_extension_helper.h"
 #include "chrome/renderer/extensions/chrome_extensions_dispatcher_delegate.h"
+#include "chrome/renderer/extensions/chrome_extensions_renderer_client.h"
 #include "chrome/renderer/extensions/extension_frame_helper.h"
 #include "chrome/renderer/extensions/renderer_permissions_policy_delegate.h"
 #include "chrome/renderer/extensions/resource_request_policy.h"
@@ -271,8 +271,10 @@ ChromeContentRendererClient::ChromeContentRendererClient() {
 
   extensions::ExtensionsClient::Set(
       extensions::ChromeExtensionsClient::GetInstance());
+#if defined(ENABLE_EXTENSIONS)
   extensions::ExtensionsRendererClient::Set(
       ChromeExtensionsRendererClient::GetInstance());
+#endif
 #if defined(ENABLE_PLUGINS)
   for (size_t i = 0; i < arraysize(kPredefinedAllowedCompositorOrigins); ++i)
     allowed_compositor_origins_.insert(kPredefinedAllowedCompositorOrigins[i]);