Remaining changes to build all code in src.git with -Wimplicit-fallthrough.

This CL was uploaded by git cl split.

R=patricialor@chromium.org

Bug: 177475
Change-Id: Idae699da611562f3d75fdd07c915265c204b74c7
Reviewed-on: https://chromium-review.googlesource.com/891884Reviewed-by: Patti <patricialor@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532681}

chrome/browser/ui/page_info/page_info_ui.cc

@@ -212,6 +212,7 @@ PageInfoUI::IdentityInfo::GetSecurityDescription() const {
       // Internal pages on desktop have their own UI implementations which
       // should never call this function.
       NOTREACHED();
+      FALLTHROUGH;
     case PageInfo::SITE_IDENTITY_STATUS_CERT:
     case PageInfo::SITE_IDENTITY_STATUS_EV_CERT:
     case PageInfo::SITE_IDENTITY_STATUS_CERT_REVOCATION_UNKNOWN:
@@ -296,7 +297,7 @@ base::string16 PageInfoUI::PermissionActionToUIString(
         button_text_ids = kPermissionButtonTextIDDefaultSetting;
         break;
       }
-    // Fallthrough.
+      FALLTHROUGH;
     case content_settings::SETTING_SOURCE_POLICY:
     case content_settings::SETTING_SOURCE_EXTENSION:
       button_text_ids = kPermissionButtonTextIDUserManaged;

chrome/browser/ui/page_info/permission_menu_model.cc

@@ -56,6 +56,7 @@ PermissionMenuModel::PermissionMenuModel(Profile* profile,
       break;
     case CONTENT_SETTING_NUM_SETTINGS:
       NOTREACHED();
+      break;
     default:
       break;
   }