[Passwords] Fix a compilation error for the password change flag

crrev/753172 removed public method |TabImpl.getProfile| and caused a
compilation error.

TODO: consider to add a CQ bot for the compilation flag

TBR=selakovic@google.com,ioanap@chromium.org

Bug: 1053522
Change-Id: I4a27681b83a70701c14b3dca3764105e3c1d8494
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2120300Reviewed-by: Maxim Kolosovskiy <kolos@chromium.org>
Commit-Queue: Maxim Kolosovskiy <kolos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#753557}

chrome/android/java/src/org/chromium/chrome/browser/password_manager/CredentialLeakDialogPasswordChangeBridge.java

@@ -9,7 +9,6 @@ import org.chromium.chrome.R;
 import org.chromium.chrome.browser.ChromeActivity;
 import org.chromium.chrome.browser.help.HelpAndFeedback;
 import org.chromium.chrome.browser.profiles.Profile;
-import org.chromium.chrome.browser.tab.TabImpl;
 import org.chromium.ui.base.WindowAndroid;
 import org.chromium.ui.modaldialog.DialogDismissalCause;
 
@@ -87,7 +86,8 @@ public class CredentialLeakDialogPasswordChangeBridge {
     private void showHelpArticle() {
         if (mActivity.get() == null) return;
 
-        Profile profile = ((TabImpl) mActivity.get().getActivityTabProvider().get()).getProfile();
+        Profile profile = Profile.fromWebContents(
+                mActivity.get().getActivityTabProvider().get().getWebContents());
         HelpAndFeedback.getInstance().show(mActivity.get(),
                 mActivity.get().getString(R.string.help_context_password_leak_detection), profile,
                 null);