Revert of Replace IPC messages in layout_test_render_frame_observer.

content/shell/BUILD.gn

Index: content/shell/BUILD.gn
diff --git a/content/shell/BUILD.gn b/content/shell/BUILD.gn
index bd3da171ce74d47e06dc702654205c40d8d8f744..6749acd82ed5b109af1f277028acb934736509b1 100644
--- a/content/shell/BUILD.gn
+++ b/content/shell/BUILD.gn
@@ -164,6 +164,8 @@
     "common/shell_origin_trial_policy.h",
     "common/shell_switches.cc",
     "common/shell_switches.h",
+    "common/shell_test_configuration.cc",
+    "common/shell_test_configuration.h",
     "renderer/layout_test/blink_test_helpers.cc",
     "renderer/layout_test/blink_test_helpers.h",
     "renderer/layout_test/blink_test_runner.cc",
@@ -758,12 +760,6 @@
 
 mojom("mojo_bindings") {
   sources = [
-    "common/layout_test.mojom",
     "common/layout_test/layout_test_bluetooth_fake_adapter_setter.mojom",
   ]
-  public_deps = [
-    "//mojo/common:common_custom_types",
-    "//ui/gfx/geometry/mojo",
-    "//url/mojo:url_mojom_gurl",
-  ]
-}
+}