Add FakeClipboard implementation for unit tests.

ui/base/clipboard/clipboard_android.cc

 // Copyright (c) 2012 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.
 
 #include "ui/base/clipboard/clipboard_android.h"
 
 #include "base/android/jni_string.h"
 #include "base/lazy_instance.h"
 #include "base/stl_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 180 matching lines @@
 std::string Clipboard::FormatType::Serialize() const {
   return data_;
 }
 
 // static
 Clipboard::FormatType Clipboard::FormatType::Deserialize(
     const std::string& serialization) {
   return FormatType(serialization);
 }
 
+bool Clipboard::FormatType::operator<(const FormatType& other) const {
+  return data_ < other.data_;
+}
+
 bool Clipboard::FormatType::Equals(const FormatType& other) const {
   return data_ == other.data_;
 }
 
 // Various predefined FormatTypes.
 // static
 Clipboard::FormatType Clipboard::GetFormatType(
     const std::string& format_string) {
   return FormatType::Deserialize(format_string);
 }
@@ skipping 54 matching lines @@
 
 // ClipboardAndroid implementation.
 ClipboardAndroid::ClipboardAndroid() {
   DCHECK(CalledOnValidThread());
 }
 
 ClipboardAndroid::~ClipboardAndroid() {
   DCHECK(CalledOnValidThread());
 }
 
-uint64 ClipboardAndroid::GetSequenceNumber(ClipboardType /* type */) {
+uint64 ClipboardAndroid::GetSequenceNumber(ClipboardType /* type */) const {
   DCHECK(CalledOnValidThread());
   // TODO: implement this. For now this interface will advertise
   // that the clipboard never changes. That's fine as long as we
   // don't rely on this signal.
   return 0;
 }
 
 bool ClipboardAndroid::IsFormatAvailable(const Clipboard::FormatType& format,
                                          ClipboardType type) const {
   DCHECK(CalledOnValidThread());
@@ skipping 161 matching lines @@
                                  const char* data_data,
                                  size_t data_len) {
   g_map.Get().Set(format.ToString(), std::string(data_data, data_len));
 }
 
 bool RegisterClipboardAndroid(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 } // namespace ui