Revert "Only allow background tabs if the underlying input event allows it"

Source/web/FrameLoaderClientImpl.cpp

Index: Source/web/FrameLoaderClientImpl.cpp
diff --git a/Source/web/FrameLoaderClientImpl.cpp b/Source/web/FrameLoaderClientImpl.cpp
index dedcf9efa9bea890f4d67a590f1648860a18bd92..4939407368f217e85a77e0ae07ad5b45808b3472 100644
--- a/Source/web/FrameLoaderClientImpl.cpp
+++ b/Source/web/FrameLoaderClientImpl.cpp
@@ -466,47 +466,10 @@ void FrameLoaderClientImpl::dispatchDidChangeThemeColor()
         m_webFrame->client()->didChangeThemeColor();
 }
 
-static bool allowCreatingBackgroundTabs()
-{
-    const WebInputEvent* inputEvent = WebViewImpl::currentInputEvent();
-    if (!inputEvent || inputEvent->type != WebInputEvent::MouseUp)
-        return false;
-
-    const WebMouseEvent* mouseEvent = static_cast<const WebMouseEvent*>(inputEvent);
-
-    unsigned short buttonNumber;
-    switch (mouseEvent->button) {
-    case WebMouseEvent::ButtonLeft:
-        buttonNumber = 0;
-        break;
-    case WebMouseEvent::ButtonMiddle:
-        buttonNumber = 1;
-        break;
-    case WebMouseEvent::ButtonRight:
-        buttonNumber = 2;
-        break;
-    default:
-        return false;
-    }
-    bool ctrl = mouseEvent->modifiers & WebMouseEvent::ControlKey;
-    bool shift = mouseEvent->modifiers & WebMouseEvent::ShiftKey;
-    bool alt = mouseEvent->modifiers & WebMouseEvent::AltKey;
-    bool meta = mouseEvent->modifiers & WebMouseEvent::MetaKey;
-
-    NavigationPolicy userPolicy;
-    if (!navigationPolicyFromMouseEvent(buttonNumber, ctrl, shift, alt, meta, &userPolicy))
-        return false;
-    return userPolicy == NavigationPolicyNewBackgroundTab;
-}
-
 NavigationPolicy FrameLoaderClientImpl::decidePolicyForNavigation(const ResourceRequest& request, DocumentLoader* loader, NavigationPolicy policy, bool isTransitionNavigation)
 {
     if (!m_webFrame->client())
         return NavigationPolicyIgnore;
-
-    if (policy == NavigationPolicyNewBackgroundTab && !allowCreatingBackgroundTabs())
-        policy = NavigationPolicyNewForegroundTab;
-
     WebDataSourceImpl* ds = WebDataSourceImpl::fromDocumentLoader(loader);
 
     WrappedResourceRequest wrappedResourceRequest(request);