Prevent ctrl+wheel from scrolling in more places

Source/platform/scroll/ScrollAnimator.cpp

Index: Source/platform/scroll/ScrollAnimator.cpp
diff --git a/Source/platform/scroll/ScrollAnimator.cpp b/Source/platform/scroll/ScrollAnimator.cpp
index 412c592362a9d5b9f78c62ab4c674b1767f7d1fa..c7d98d7711b8c26a8a95c8f1f04e7d7441731cc4 100644
--- a/Source/platform/scroll/ScrollAnimator.cpp
+++ b/Source/platform/scroll/ScrollAnimator.cpp
@@ -76,6 +76,10 @@ void ScrollAnimator::scrollToOffsetWithoutAnimation(const FloatPoint& offset)
 
 bool ScrollAnimator::handleWheelEvent(const PlatformWheelEvent& e)
 {
+    // ctrl+wheel events are used to trigger zooming, not scrolling.

[rjkroege, 2014/03/26 20:03:25]

i am not convinced that this is the right place to do this. Why can't the
decision happen in EventHandler?

ScrollAnimator is (at least in my opinion) only about scrolling.

+    if (e.modifiers() & PlatformEvent::CtrlKey)
+        return false;
+
     bool canScrollX = m_scrollableArea->userInputScrollable(HorizontalScrollbar);
     bool canScrollY = m_scrollableArea->userInputScrollable(VerticalScrollbar);