Restrict CM API interface request and message dispatch.

chrome/browser/password_manager/chrome_password_manager_client.cc

 // Copyright 2014 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.
 
 #include "chrome/browser/password_manager/chrome_password_manager_client.h"
 
 #include <string>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 418 matching lines @@
   safe_browsing::PasswordProtectionService* pps =
       GetPasswordProtectionService();
   if (pps) {
     pps->MaybeStartProtectedPasswordEntryRequest(
         web_contents(), GetMainFrameURL(), password_saved_domain,
         password_field_exists);
   }
 }
 #endif
 
-// TODO(crbug.com/706392): Fix password reuse detection for Android.
-#if !defined(OS_ANDROID)
 void ChromePasswordManagerClient::DidFinishNavigation(
     content::NavigationHandle* navigation_handle) {
   if (!navigation_handle->IsInMainFrame() || !navigation_handle->HasCommitted())
     return;
 
+  // From this point on, the CredentialManagerImpl will service API calls in the
+  // context of the new WebContents::GetLastCommittedURL, which may very well be
+  // cross-origin. Disconnect existing client, and drop pending requests.
+  if (!navigation_handle->IsSameDocument())
+    credential_manager_impl_.DisconnectBinding();
+
+// TODO(crbug.com/706392): Fix password reuse detection for Android.
+#if !defined(OS_ANDROID)
   password_reuse_detection_manager_.DidNavigateMainFrame(GetMainFrameURL());
   // After some navigations RenderViewHost persists and just adding the observer
   // will cause multiple call of OnInputEvent. Since Widget API doesn't allow to
   // check whether the observer is already added, the observer is removed and
   // added again, to ensure that it is added only once.
   web_contents()->GetRenderViewHost()->GetWidget()->RemoveInputEventObserver(
       this);
   web_contents()->GetRenderViewHost()->GetWidget()->AddInputEventObserver(this);
+#endif
 }
 
+#if !defined(OS_ANDROID)
 void ChromePasswordManagerClient::OnInputEvent(
     const blink::WebInputEvent& event) {
   if (event.GetType() != blink::WebInputEvent::kChar)
     return;
   const blink::WebKeyboardEvent& key_event =
       static_cast<const blink::WebKeyboardEvent&>(event);
   password_reuse_detection_manager_.OnKeyPressed(key_event.text);
 }
 #endif
 
@@ skipping 231 matching lines @@
     password_manager::mojom::CredentialManagerRequest request,
     content::RenderFrameHost* render_frame_host) {
   // Only valid for the main frame.
   if (render_frame_host->GetParent())
     return;
 
   content::WebContents* web_contents =
       content::WebContents::FromRenderFrameHost(render_frame_host);
   DCHECK(web_contents);
 
+  // Only valid for the currently committed RenderFrameHost, and not, e.g. old
+  // zombie RFH's being swapped out following cross-origin navigations.
+  if (web_contents->GetMainFrame() != render_frame_host)

[vasilii, 2017/06/23 18:58:28]

I don't mind this check to be on the safe side. Out of curiosity, do you know a
scenario which at least in theory would fail here?

[engedy, 2017/06/28 16:26:58]

I have added browser tests to exercise this scenario (see tests with
preestablish_mojo_pipe == false).

+    return;
+
   ChromePasswordManagerClient* instance =
       ChromePasswordManagerClient::FromWebContents(web_contents);
 
   // Try to bind to the driver, but if driver is not available for this render
   // frame host, the request will be just dropped. This will cause the message
   // pipe to be closed, which will raise a connection error on the peer side.
   if (!instance)
     return;
 
   instance->credential_manager_impl_.BindRequest(std::move(request));
 }
 
 // static
 bool ChromePasswordManagerClient::CanShowBubbleOnURL(const GURL& url) {
   std::string scheme = url.scheme();
   return (content::ChildProcessSecurityPolicy::GetInstance()->IsWebSafeScheme(
               scheme) &&
 #if BUILDFLAG(ENABLE_EXTENSIONS)
           scheme != extensions::kExtensionScheme &&
 #endif
           scheme != content::kChromeDevToolsScheme);
 }