GN: Make content and content_shell work when !enable_plugins

content/test/BUILD.gn

Index: content/test/BUILD.gn
diff --git a/content/test/BUILD.gn b/content/test/BUILD.gn
index 6224b5f972c3086407305675d8b9ca1bf79bbc54..0b07f6bf4537175e77584d70842819fb08d7499b 100644
--- a/content/test/BUILD.gn
+++ b/content/test/BUILD.gn
@@ -44,7 +44,6 @@ static_library("test_support") {
       "//content/browser/speech/proto",
       "//content/child",
       "//content/gpu",
-      "//content/ppapi_plugin",
       "//content/public/renderer",
       "//content/public/utility",
       "//cc",
@@ -66,6 +65,10 @@ static_library("test_support") {
       "//third_party/WebKit/public:blink",
     ]
 
+    if (enable_plugins) {
+      deps += [ "//content/ppapi_plugin" ]
+    }
+
     if (enable_webrtc) {
       # TODO(GYP) remove this when libjingle is converted.
       configs += [ "//third_party/libjingle:jingle_direct_dependent_configs" ]
@@ -87,6 +90,9 @@ static_library("test_support") {
         "//third_party/webrtc/modules/video_capture",
       ]
     }
+    if (!enable_plugins) {
+      sources -= [ "ppapi_unittest.cc" ]
+    }
 
     if (use_glib) {
       configs += [ "//build/config/linux:glib" ]