Stop linking in the old Mojo EDK.

ipc/mojo/BUILD.gn

Index: ipc/mojo/BUILD.gn
diff --git a/ipc/mojo/BUILD.gn b/ipc/mojo/BUILD.gn
index 29e3a9574205ecb91d1abb356f066de0db8205cc..30f15f0a6407b3fbdbf78c0efe49763e59adfbe6 100644
--- a/ipc/mojo/BUILD.gn
+++ b/ipc/mojo/BUILD.gn
@@ -5,17 +5,10 @@
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//testing/test.gni")
 
-mojom("client_channel") {
-  sources = [
-    "client_channel.mojom",
-  ]
-}
-
 component("mojo") {
   sources = [
     "async_handle_waiter.cc",
     "async_handle_waiter.h",
-    "client_channel.mojom",
     "ipc_channel_mojo.cc",
     "ipc_channel_mojo.h",
     "ipc_message_pipe_reader.cc",
@@ -35,14 +28,13 @@ component("mojo") {
   defines = [ "IPC_MOJO_IMPLEMENTATION" ]
 
   deps = [
-    ":client_channel",
     "//base",
     "//base/third_party/dynamic_annotations",
     "//ipc",
+    "//mojo/edk/system",
     "//mojo/environment:chromium",
     "//mojo/public/c/environment:environment",
     "//mojo/public/cpp/bindings",
-    "//third_party/mojo/src/mojo/edk/system",
   ]
 }
 
@@ -61,9 +53,9 @@ test("ipc_mojo_unittests") {
     "//ipc",
     "//ipc:test_support",
     "//ipc/mojo",
+    "//mojo/edk/system",
     "//mojo/environment:chromium",
     "//testing/gtest",
-    "//third_party/mojo/src/mojo/edk/system",
     "//url",
   ]
 }
@@ -81,8 +73,8 @@ test("ipc_mojo_perftests") {
     "//ipc",
     "//ipc:test_support",
     "//ipc/mojo",
+    "//mojo/edk/system",
     "//mojo/environment:chromium",
-    "//third_party/mojo/src/mojo/edk/system",
     "//url",
   ]
 }