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

chrome/browser/autofill/api/autofill_client.h

Index: chrome/browser/autofill/api/autofill_client.h
diff --git a/chrome/browser/autofill/api/autofill_client.h b/chrome/browser/autofill/api/autofill_client.h
new file mode 100644
index 0000000000000000000000000000000000000000..2a297019e4d5096cb994e9e96a78d052afb89205
--- /dev/null
+++ b/chrome/browser/autofill/api/autofill_client.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_CLIENT_H_
+#define CHROME_BROWSER_AUTOFILL_API_AUTOFILL_CLIENT_H_
+
+class InfoBarTabService;
+class PrefServiceBase;
+
+namespace autofill {
+
+// A delegate interface that needs to be supplied to AutofillManager
+// by the embedder.
+//
+// Each client instance is associated with a given context within
+// which an AutofillManager is used (e.g. a single tab), so when we
+// say "for the client" below, we mean "in the execution context the
+// client is associated with" (e.g. for the tab the AutofillManager is
+// attached to).
+class AutofillClient {

[Ilya Sherman, 2012/08/22 03:38:03]

Hmm, this seems like it is more of a host than a client.  What do you think of
naming this something more like AutofillHost?

+ public:
+  virtual ~AutofillClient() {}
+
+  // Gets the infobar service associated with the client.
+  //
+  // TODO(joi): Given the approach (which we will likely use more
+  // widely) of a context associated with the instance of the client,
+  // 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 client.
+  virtual PrefServiceBase* GetPrefs() = 0;
+
+  // Returns true if saving passwords is currently enabled for the
+  // client.
+  virtual bool IsSavingPasswordsEnabled() = 0;
+};
+
+}  // namespace autofill
+
+#endif  // CHROME_BROWSER_AUTOFILL_API_AUTOFILL_CLIENT_H_