Move SearchProvider implementation into Blink and make it a no-op.

third_party/WebKit/Source/core/frame/External.h

Index: third_party/WebKit/Source/core/frame/External.h
diff --git a/third_party/WebKit/Source/core/frame/External.h b/third_party/WebKit/Source/core/frame/External.h
new file mode 100644
index 0000000000000000000000000000000000000000..d6a26a3728a9ec8b056b6b05709b75118bc44e31
--- /dev/null
+++ b/third_party/WebKit/Source/core/frame/External.h
@@ -0,0 +1,26 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef External_h
+#define External_h
+
+#include "bindings/core/v8/ScriptWrappable.h"
+#include "platform/heap/Handle.h"
+
+namespace blink {
+
+class External : public GarbageCollected<External>, public ScriptWrappable {
+    DEFINE_WRAPPERTYPEINFO();
+public:
+    External() = default;
+
+    void AddSearchProvider() { }
+    void IsSearchProviderInstalled() { }
+
+    DEFINE_INLINE_TRACE() { }
+};
+
+} // namespace blink
+
+#endif // External_h