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

chrome/renderer/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
 import("//tools/grit/grit_rule.gni")
 
 gypi_values = exec_script(
     "//build/gypi_to_gn.py",
     [ rebase_path("../chrome_renderer.gypi") ],
@@ skipping 33 matching lines @@
     "//components/startup_metric_utils",
     "//components/translate/content/renderer",
     "//components/translate/core/common",
     "//components/translate/core/language_detection",
     "//components/visitedlink/renderer",
     "//components/web_cache/renderer",
     "//content/app/resources",
     "//content/app/strings",
     "//content/public/renderer",
     "//extensions:extensions_resources",
-    "//extensions/renderer",
     "//media/cast:net",
     "//media/cast:sender",
     "//media/cast/logging/proto",
     "//net",
     "//skia",
     "//storage/common",
     "//third_party/WebKit/public:blink",
     "//third_party/WebKit/public:resources",
     "//third_party/icu",
     "//third_party/npapi",
@@ skipping 36 matching lines @@
   if (safe_browsing_mode == 2) {
     sources += rebase_path(
         gypi_values.chrome_renderer_basic_safe_browsing_sources,
         ".", "..")
     defines += [ "MOBILE_SAFE_BROWSING" ]
   }
 
   if (enable_extensions) {
     sources += rebase_path(gypi_values.chrome_renderer_extensions_sources,
                            ".", "..")
+    deps += [ "//extensions/renderer" ]
   }
   if (enable_webrtc) {
     sources += rebase_path(gypi_values.chrome_renderer_webrtc_sources,
                            ".", "..")
   }
   if (enable_extensions && enable_webrtc) {
     sources += rebase_path(
         gypi_values.chrome_renderer_webrtc_extensions_sources, ".", "..")
   }
   if (enable_spellcheck) {
@@ skipping 70 matching lines @@
     ]
   }
 
   if (enable_webrtc) {
     sources += [
       "media/mock_webrtc_logging_message_filter.cc",
       "media/mock_webrtc_logging_message_filter.h",
     ]
   }
 }