Move TextInputController from CppBoundClass to gin::Wrappable.

content/shell/renderer/webkit_test_runner.cc

Index: content/shell/renderer/webkit_test_runner.cc
diff --git a/content/shell/renderer/webkit_test_runner.cc b/content/shell/renderer/webkit_test_runner.cc
index 0484667d3fbbe30f638f30d29b5c0f2d7b5e7ef6..b93f29e47b2848f6662eb7b09ec2b912c5b3c647 100644
--- a/content/shell/renderer/webkit_test_runner.cc
+++ b/content/shell/renderer/webkit_test_runner.cc
@@ -36,6 +36,7 @@
 #include "content/shell/renderer/test_runner/WebTestInterfaces.h"
 #include "content/shell/renderer/test_runner/WebTestProxy.h"
 #include "content/shell/renderer/test_runner/WebTestRunner.h"
+#include "content/shell/renderer/test_runner/text_input_controller.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_util.h"
 #include "skia/ext/platform_canvas.h"
@@ -555,8 +556,10 @@ void WebKitTestRunner::captureHistoryForWindow(
 void WebKitTestRunner::DidClearWindowObject(WebFrame* frame, int world_id) {
   WebTestingSupport::injectInternalsObject(frame);
   ShellRenderProcessObserver::GetInstance()->test_interfaces()->bindTo(frame);
-  if (world_id == 0)
+  if (world_id == 0) {
     GCController::Install(frame);
+    WebTestRunner::TextInputController::Install(frame);
+  }
 }
 
 bool WebKitTestRunner::OnMessageReceived(const IPC::Message& message) {