Revert of Switch components/password_manager code from IPC messages to Mojo.

components/password_manager/content/renderer/credential_manager_client.h

Index: components/password_manager/content/renderer/credential_manager_client.h
diff --git a/components/password_manager/content/renderer/credential_manager_client.h b/components/password_manager/content/renderer/credential_manager_client.h
index 99bd96d412db8727a87b9267c3ecffd94c9a2dab..d87e4601f467ae873f2c066143331e87025cca39 100644
--- a/components/password_manager/content/renderer/credential_manager_client.h
+++ b/components/password_manager/content/renderer/credential_manager_client.h
@@ -6,9 +6,10 @@
 #define COMPONENTS_PASSWORD_MANAGER_CONTENT_RENDERER_CREDENTIAL_MANAGER_CLIENT_H_
 
 #include "base/compiler_specific.h"
+#include "base/id_map.h"
 #include "base/macros.h"
-#include "components/password_manager/content/public/interfaces/credential_manager.mojom.h"
 #include "content/public/renderer/render_view_observer.h"
+#include "ipc/ipc_listener.h"
 #include "third_party/WebKit/public/platform/WebCredentialManagerClient.h"
 #include "third_party/WebKit/public/platform/WebCredentialManagerError.h"
 #include "third_party/WebKit/public/platform/WebVector.h"
@@ -44,7 +45,19 @@
   explicit CredentialManagerClient(content::RenderView* render_view);
   ~CredentialManagerClient() override;
 
-  // blink::WebCredentialManagerClient:
+  // RenderViewObserver:
+  bool OnMessageReceived(const IPC::Message& message) override;
+
+  // Message handlers for messages from the browser process:
+  virtual void OnAcknowledgeStore(int request_id);
+  virtual void OnAcknowledgeRequireUserMediation(int request_id);
+  virtual void OnSendCredential(int request_id,
+                                const CredentialInfo& credential_info);
+  virtual void OnRejectCredentialRequest(
+      int request_id,
+      blink::WebCredentialManagerError error);
+
+  // blink::WebCredentialManager:
   void dispatchStore(
       const blink::WebCredential& credential,
       WebCredentialManagerClient::NotificationCallbacks* callbacks) override;
@@ -55,9 +68,19 @@
                    RequestCallbacks* callbacks) override;
 
  private:
-  void ConnectToMojoCMIfNeeded();
+  typedef IDMap<blink::WebCredentialManagerClient::RequestCallbacks,
+                IDMapOwnPointer> RequestCallbacksMap;
+  typedef IDMap<blink::WebCredentialManagerClient::NotificationCallbacks,
+                IDMapOwnPointer> NotificationCallbacksMap;
 
-  mojom::CredentialManagerPtr mojo_cm_service_;
+  void RespondToNotificationCallback(int request_id,
+                                     NotificationCallbacksMap* map);
+
+  // Track the various blink::WebCredentialManagerClient::*Callbacks objects
+  // generated from Blink. This class takes ownership of these objects.
+  NotificationCallbacksMap store_callbacks_;
+  NotificationCallbacksMap require_user_mediation_callbacks_;
+  RequestCallbacksMap get_callbacks_;
 
   DISALLOW_COPY_AND_ASSIGN(CredentialManagerClient);
 };