Convert GetSearchProviderInstallState to Mojo

chrome/common/install_state_traits.h

Index: chrome/common/install_state_traits.h
diff --git a/android_webview/common/render_view_messages.cc b/chrome/common/install_state_traits.h
similarity index 39%
copy from android_webview/common/render_view_messages.cc
copy to chrome/common/install_state_traits.h
index a954e2a69c06eec84b32a791feeab900cee6057d..64a1b0d5a4e0b20a0efac7332180b7b06fbcc49a 100644
--- a/android_webview/common/render_view_messages.cc
+++ b/chrome/common/install_state_traits.h
@@ -2,10 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "android_webview/common/render_view_messages.h"
+#include "chrome/common/search_provider.h"
+#include "ipc/ipc_message_macros.h"
 
-namespace IPC {
-
-// TODO - add enums and custom IPC traits here when needed.
-
-}  // namespace IPC
+IPC_ENUM_TRAITS_MIN_MAX_VALUE(search_provider::InstallState,
+                              search_provider::DENIED,
+                              search_provider::INSTALLED_STATE_LAST)