Cleanup: Put more plugin code behind the ENABLE_PLUGINS ifdef.

content/browser/browser_main_loop.cc

Index: content/browser/browser_main_loop.cc
diff --git a/content/browser/browser_main_loop.cc b/content/browser/browser_main_loop.cc
index 5c5b3fea25fc1bf736384ee516b3c7c3fed3c902..882054f1615397bc81d045607ceb323989a588c7 100644
--- a/content/browser/browser_main_loop.cc
+++ b/content/browser/browser_main_loop.cc
@@ -37,7 +37,6 @@
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
 #include "content/browser/media/media_internals.h"
 #include "content/browser/net/browser_online_state_observer.h"
-#include "content/browser/plugin_service_impl.h"
 #include "content/browser/renderer_host/media/media_stream_manager.h"
 #include "content/browser/speech/speech_recognition_manager_impl.h"
 #include "content/browser/startup_task_runner.h"
@@ -116,6 +115,10 @@
 #include "sandbox/linux/suid/client/setuid_sandbox_client.h"
 #endif
 
+#if defined(ENABLE_PLUGINS)
+#include "content/browser/plugin_service_impl.h"
+#endif
+
 #if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED)
 #include "third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h"
 #endif
@@ -1003,8 +1006,7 @@ int BrowserMainLoop::BrowserThreadsStarted() {
     ImageTransportFactory::Initialize();
 #if defined(USE_AURA)
     if (aura::Env::GetInstance()) {
-      aura::Env::GetInstance()->set_context_factory(
-          content::GetContextFactory());
+      aura::Env::GetInstance()->set_context_factory(GetContextFactory());
     }
 #endif
   }