Add some src/webkit build files to the GN build.

content/browser/BUILD.gn

Index: content/browser/BUILD.gn
diff --git a/content/browser/BUILD.gn b/content/browser/BUILD.gn
index 1cddc6addc191b823533b829e2ad857980971929..b53498b4c9cb3d96c7fba36f36144afe4fd2db6a 100644
--- a/content/browser/BUILD.gn
+++ b/content/browser/BUILD.gn
@@ -34,9 +34,12 @@ source_set("browser") {
   deps = [
     "//base",
     "//crypto",
+    "//google_apis",
     "//net",
+    "//net:http_server",
     "//skia",
     "//sql",
+    "//third_party/leveldatabase",
     "//third_party/re2",
     "//third_party/WebKit/public:blink_headers",
     "//third_party/zlib",
@@ -49,9 +52,14 @@ source_set("browser") {
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/resources",
+    "//ui/surface",
+    "//webkit:resources",
+    "//webkit:strings",
+    "//webkit/browser:storage",
+    "//webkit/common",
+    "//webkit/common:storage",
     # TODO(GYP)
     #"//ui/snapshot",
-    #'../google_apis/google_apis.gyp:google_apis',
     #'browser/service_worker/service_worker_proto.gyp:database_proto',
     #'browser/speech/proto/speech_proto.gyp:speech_proto',
     #'browser/devtools/devtools_resources.gyp:devtools_resources',
@@ -60,14 +68,6 @@ source_set("browser") {
     #'../mojo/mojo.gyp:mojo_cpp_bindings',
     #'../mojo/mojo.gyp:mojo_js_bindings',
     #'../mojo/mojo.gyp:mojo_service_provider_bindings',
-    #'../net/net.gyp:http_server',
-    #'../third_party/leveldatabase/leveldatabase.gyp:leveldatabase',
-    #'../ui/surface/surface.gyp:surface',
-    #'../webkit/common/webkit_common.gyp:webkit_common',
-    #'../webkit/storage_browser.gyp:webkit_storage_browser',
-    #'../webkit/storage_common.gyp:webkit_storage_common',
-    #'../webkit/webkit_resources.gyp:webkit_resources',
-    #'../webkit/webkit_resources.gyp:webkit_strings',
     #'../third_party/angle/src/build_angle.gyp:commit_id',
   ]