Revert of [sync] Sign user out of Chrome on dashboard stop and reset

chrome/browser/android/signin/signin_manager_android.h

Index: chrome/browser/android/signin/signin_manager_android.h
diff --git a/chrome/browser/android/signin/signin_manager_android.h b/chrome/browser/android/signin/signin_manager_android.h
index 1d9c1528edb6bb8a16e19dedf619eddf28c3b48c..6a414e77280898eed78bd41fbd08eef62f4273aa 100644
--- a/chrome/browser/android/signin/signin_manager_android.h
+++ b/chrome/browser/android/signin/signin_manager_android.h
@@ -13,9 +13,7 @@
 #include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
-#include "base/threading/thread_checker.h"
 #include "components/prefs/pref_change_registrar.h"
-#include "components/signin/core/browser/signin_manager_base.h"
 
 class Profile;
 
@@ -31,7 +29,7 @@
 //
 // This class implements parts of the sign-in flow, to make sure that policy
 // is available before sign-in completes.
-class SigninManagerAndroid : public SigninManagerBase::Observer {
+class SigninManagerAndroid {
  public:
   SigninManagerAndroid(JNIEnv* env, jobject obj);
 
@@ -78,16 +76,8 @@
   jboolean IsSignedInOnNative(JNIEnv* env,
                               const base::android::JavaParamRef<jobject>& obj);
 
-  // SigninManagerBase::Observer implementation.
-  void GoogleSigninFailed(const GoogleServiceAuthError& error) override;
-  void GoogleSigninSucceeded(const std::string& account_id,
-                             const std::string& username,
-                             const std::string& password) override;
-  void GoogleSignedOut(const std::string& account_id,
-                       const std::string& username) override;
-
  private:
-  ~SigninManagerAndroid() override;
+  ~SigninManagerAndroid();
 
   void OnPolicyRegisterDone(const std::string& dm_token,
                             const std::string& client_id);
@@ -116,8 +106,6 @@
 
   PrefChangeRegistrar pref_change_registrar_;
 
-  base::ThreadChecker thread_checker_;
-
   base::WeakPtrFactory<SigninManagerAndroid> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SigninManagerAndroid);