Code problems detected by cppcheck

Source/core/page/DragController.cpp

Index: Source/core/page/DragController.cpp
diff --git a/Source/core/page/DragController.cpp b/Source/core/page/DragController.cpp
index 075b45c3f4358a4a8e48d00d5de861adf7af7303..32fd86e248e99bee0ff3ab1f54be4165467e1238 100644
--- a/Source/core/page/DragController.cpp
+++ b/Source/core/page/DragController.cpp
@@ -110,13 +110,11 @@ static bool dragTypeIsValid(DragSourceAction action)
 
 static PlatformMouseEvent createMouseEvent(DragData* dragData)
 {
-    bool shiftKey, ctrlKey, altKey, metaKey;
-    shiftKey = ctrlKey = altKey = metaKey = false;
     int keyState = dragData->modifierKeyState();
-    shiftKey = static_cast<bool>(keyState & PlatformEvent::ShiftKey);
-    ctrlKey = static_cast<bool>(keyState & PlatformEvent::CtrlKey);
-    altKey = static_cast<bool>(keyState & PlatformEvent::AltKey);
-    metaKey = static_cast<bool>(keyState & PlatformEvent::MetaKey);
+    bool shiftKey = static_cast<bool>(keyState & PlatformEvent::ShiftKey);
+    bool ctrlKey = static_cast<bool>(keyState & PlatformEvent::CtrlKey);
+    bool altKey = static_cast<bool>(keyState & PlatformEvent::AltKey);
+    bool metaKey = static_cast<bool>(keyState & PlatformEvent::MetaKey);
 
     return PlatformMouseEvent(dragData->clientPosition(), dragData->globalPosition(),
                               LeftButton, PlatformEvent::MouseMoved, 0, shiftKey, ctrlKey, altKey,