DevTools: remove devtools_discovery (merged into content).

chrome/browser/android/dev_tools_discovery_provider_android.h

 // Copyright 2015 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 CHROME_BROWSER_ANDROID_DEV_TOOLS_DISCOVERY_PROVIDER_ANDROID_H_
 #define CHROME_BROWSER_ANDROID_DEV_TOOLS_DISCOVERY_PROVIDER_ANDROID_H_
 
 #include "base/macros.h"
-#include "components/devtools_discovery/devtools_discovery_manager.h"
 
-class DevToolsDiscoveryProviderAndroid :
-    public devtools_discovery::DevToolsDiscoveryManager::Provider {
+class DevToolsDiscoveryProviderAndroid {
  public:
   // Installs provider to devtools_discovery.
   static void Install();
 
-  ~DevToolsDiscoveryProviderAndroid() override;
-
-  // devtools_discovery::DevToolsDiscoveryManager::Provider implementation.
-  content::DevToolsAgentHost::List GetDescriptors() override;
-
  private:
   DevToolsDiscoveryProviderAndroid();
+  ~DevToolsDiscoveryProviderAndroid();
 
   DISALLOW_COPY_AND_ASSIGN(DevToolsDiscoveryProviderAndroid);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_DEV_TOOLS_DISCOVERY_PROVIDER_ANDROID_H_