Delete Android content detectors.

content/renderer/android/email_detector.h

-// 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.
-
-#ifndef CONTENT_RENDERER_ANDROID_EMAIL_DETECTOR_H_
-#define CONTENT_RENDERER_ANDROID_EMAIL_DETECTOR_H_
-
-#include <stddef.h>
-
-#include "base/compiler_specific.h"
-#include "base/macros.h"
-#include "content/common/content_export.h"
-#include "content/renderer/android/content_detector.h"
-
-namespace content {
-
-class EmailDetectorTest;
-
-// Finds email addresses (in most common formats, but not including special
-// characters) in the given text string.
-class CONTENT_EXPORT EmailDetector : public ContentDetector {
- public:
-  EmailDetector();
-
- private:
-  friend class EmailDetectorTest;
-
-  // Implementation of ContentDetector.
-  bool FindContent(const base::string16::const_iterator& begin,
-                   const base::string16::const_iterator& end,
-                   size_t* start_pos,
-                   size_t* end_pos,
-                   std::string* content_text) override;
-  GURL GetIntentURL(const std::string& content_text) override;
-  size_t GetMaximumContentLength() override;
-
-  DISALLOW_COPY_AND_ASSIGN(EmailDetector);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_RENDERER_ANDROID_EMAIL_DETECTOR_H_