Fix static analyzer findings.

Fix possible calls on null pointer.

Change-Id: I5899e0debfba13afc330a88d6d2eaec29275fa77
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1533907
Commit-Queue: Alexander Kalugin <akalugin@yandex-team.ru>
Reviewed-by: Varun Khaneja <vakh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#649766}

components/safe_browsing/password_protection/password_protection_request.cc

@@ -247,8 +247,10 @@ void PasswordProtectionRequest::CollectVisualFeatures() {
   content::RenderWidgetHostView* view =
       web_contents_ ? web_contents_->GetRenderWidgetHostView() : nullptr;
 
-  if (!view)
+  if (!view) {
     SendRequest();
+    return;
+  }
 
   visual_feature_start_time_ = base::TimeTicks::Now();
 

components/safe_browsing/web_ui/safe_browsing_ui.cc

@@ -1180,6 +1180,7 @@ void SafeBrowsingUIHandler::GetReferrerChain(const base::ListValue* args) {
   if (!provider) {
     AllowJavascript();
     ResolveJavascriptCallback(base::Value(callback_id), base::Value(""));
+    return;
   }
 
   ReferrerChain referrer_chain;