NOT FOR LANDING: Thread the needle through all webmodules.

third_party/WebKit/Source/web/BUILD.gn

Index: third_party/WebKit/Source/web/BUILD.gn
diff --git a/third_party/WebKit/Source/web/BUILD.gn b/third_party/WebKit/Source/web/BUILD.gn
index 2d7efe15928862d8f9007c5174df2a2ae565775d..c13c4ce2a8c08eea667a5aadf55ceb4684d9d748 100644
--- a/third_party/WebKit/Source/web/BUILD.gn
+++ b/third_party/WebKit/Source/web/BUILD.gn
@@ -15,6 +15,7 @@ component("web") {
   output_name = "blink_web"
 
   deps = [
+    ":web_agents",
     "//skia",
     "//third_party/WebKit/Source/core",
     "//third_party/WebKit/Source/modules",
@@ -287,6 +288,27 @@ component("web") {
   }
 }
 
+source_set("web_agents") {
+  deps = [
+    "//skia",
+    "//third_party/WebKit/Source/bindings/core/v8:fake_gen_compiled",
+    "//third_party/WebKit/Source/wtf",
+    "//v8",
+  ]
+
+  sources = [
+    "agent/agent.h",
+    "agent/sample/sample_agent.cc",
+    "agent/sample/sample_agent.h",
+    "api/frame.h",
+  ]
+
+  configs += [
+    "//third_party/WebKit/Source:config",
+    "//third_party/WebKit/Source/core:blink_core_pch",
+  ]
+}
+
 static_library("test_support") {
   deps = [
     "//skia",