Reflow of user menu's active profile card into a button

Reflowed the top section of the user menu (i.e. where the profile icon and avatar name are displayed) into a button that leads to chrome://settings/manageProfile.

See screenshots (marked with 4.*:
https://drive.google.com/corp/drive/folders/0B7Fvv7JszRyGY2NrSEhheHptdG8

Mockup:
https://folio.googleplex.com/chrome-ux-specs-and-sources/Chrome%20Desktop%20Sign%20In/user_menu#%2Fspec-2.png

Upstream CL (landed):
https://codereview.chromium.org/2023093002/

BUG=615893

Review-Url: https://codereview.chromium.org/2052473003
Cr-Commit-Position: refs/heads/master@{#403919}

chrome/browser/ui/views/profiles/profile_chooser_view.h

@@ -240,13 +240,17 @@ class ProfileChooserView : public content::WebContentsDelegate,
 
   // Links and buttons displayed in the active profile card.
   views::Link* manage_accounts_link_;
+  views::LabelButton* manage_accounts_button_;
   views::LabelButton* signin_current_profile_button_;
   views::LabelButton* auth_error_email_button_;
 
-  // The profile name and photo in the active profile card. Owned by the
-  // views hierarchy.
+  // The profile name and photo in the active profile card in non-material-
+  // design user menu. Owned by the views hierarchy.
   EditableProfilePhoto* current_profile_photo_;
   EditableProfileName* current_profile_name_;
+  // For material design user menu, the active profile card owns the profile
+  // name and photo.
+  views::LabelButton* current_profile_card_;
 
   // Action buttons.
   views::LabelButton* guest_profile_button_;