Introduce AutofillClient and use it to get rid of PasswordManager dependency.

chrome/browser/autofill/api/autofill_manager_delegate.h

Index: chrome/browser/autofill/api/autofill_manager_delegate.h
diff --git a/chrome/browser/autofill/api/autofill_manager_delegate.h b/chrome/browser/autofill/api/autofill_manager_delegate.h
new file mode 100644
index 0000000000000000000000000000000000000000..3f478a1be042ce1a77bac4a0b5655f45e95bf5d1
--- /dev/null
+++ b/chrome/browser/autofill/api/autofill_manager_delegate.h
@@ -0,0 +1,44 @@
+// 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 CHROME_BROWSER_AUTOFILL_API_AUTOFILL_MANAGER_DELEGATE_H_
+#define CHROME_BROWSER_AUTOFILL_API_AUTOFILL_MANAGER_DELEGATE_H_
+
+class InfoBarTabService;
+class PrefServiceBase;
+
+namespace autofill {
+
+// A delegate interface that needs to be supplied to AutofillManager
+// by the embedder.
+//
+// Each delegate instance is associated with a given context within
+// which an AutofillManager is used (e.g. a single tab), so when we
+// say "for the delegate" below, we mean "in the execution context the
+// delegate is associated with" (e.g. for the tab the AutofillManager is
+// attached to).
+class AutofillManagerDelegate {
+ public:
+  virtual ~AutofillManagerDelegate() {}
+
+  // Gets the infobar service associated with the delegate.
+  //
+  // TODO(joi): Given the approach (which we will likely use more
+  // widely) of a context associated with the instance of the delegate,
+  // it seems right to rename InfoBarTabService to just
+  // InfoBarService.  Naming the getter appropriately, will name the
+  // class itself in a follow-up change.
+  virtual InfoBarTabService* GetInfoBarService() = 0;
+
+  // Gets the preferences associated with the delegate.
+  virtual PrefServiceBase* GetPrefs() = 0;
+
+  // Returns true if saving passwords is currently enabled for the
+  // delegate.
+  virtual bool IsSavingPasswordsEnabled() const = 0;
+};
+
+}  // namespace autofill
+
+#endif  // CHROME_BROWSER_AUTOFILL_API_AUTOFILL_MANAGER_DELEGATE_H_