Disallow background tabs without matching user gesture for createWindow()

BUG=431335
R=mkwst@chromium.org
TEST=content_shell doesn't do tabs, so no tests

Review URL: https://codereview.chromium.org/730013002

git-svn-id: svn://svn.chromium.org/blink/trunk@185430 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/web/ChromeClientImpl.cpp

@@ -229,6 +229,8 @@ Page* ChromeClientImpl::createWindow(LocalFrame* frame, const FrameLoadRequest&
     WebNavigationPolicy policy = static_cast<WebNavigationPolicy>(navigationPolicy);
     if (policy == WebNavigationPolicyIgnore)
         policy = getNavigationPolicy();
+    else if (policy == WebNavigationPolicyNewBackgroundTab && getNavigationPolicy() != WebNavigationPolicyNewBackgroundTab)
+        policy = WebNavigationPolicyNewForegroundTab;
 
     ASSERT(frame->document());
     Fullscreen::fullyExitFullscreen(*frame->document());
@@ -301,6 +303,8 @@ void ChromeClientImpl::show(NavigationPolicy navigationPolicy)
     WebNavigationPolicy policy = static_cast<WebNavigationPolicy>(navigationPolicy);
     if (policy == WebNavigationPolicyIgnore)
         policy = getNavigationPolicy();
+    else if (policy == WebNavigationPolicyNewBackgroundTab && getNavigationPolicy() != WebNavigationPolicyNewBackgroundTab)
+        policy = WebNavigationPolicyNewForegroundTab;
     m_webView->client()->show(policy);
 }