Extract more of the mouse logic from EventHandler

third_party/WebKit/Source/core/input/GestureManager.h

Index: third_party/WebKit/Source/core/input/GestureManager.h
diff --git a/third_party/WebKit/Source/core/input/GestureManager.h b/third_party/WebKit/Source/core/input/GestureManager.h
index 7e223627fec60ff2c1f01f63decd680d72a7520f..8cf4e5ffd9734448a3d482d78ec48ea3170c8cf4 100644
--- a/third_party/WebKit/Source/core/input/GestureManager.h
+++ b/third_party/WebKit/Source/core/input/GestureManager.h
@@ -17,6 +17,7 @@ namespace blink {
 class ScrollManager;
 class SelectionController;
 class PointerEventManager;
+class MouseEventManager;
 
 // This class takes care of gestures and delegating the action based on the
 // gesture to the responsible class.
@@ -24,8 +25,8 @@ class CORE_EXPORT GestureManager : public GarbageCollectedFinalized<GestureManag
     WTF_MAKE_NONCOPYABLE(GestureManager);
 
 public:
-    GestureManager(LocalFrame*, ScrollManager*, PointerEventManager*,
-        SelectionController*);
+    GestureManager(LocalFrame*, ScrollManager*, MouseEventManager*,
+        PointerEventManager*, SelectionController*);
     DECLARE_TRACE();
 
     void clear();
@@ -56,6 +57,7 @@ private:
     const Member<LocalFrame> m_frame;
 
     Member<ScrollManager> m_scrollManager;
+    Member<MouseEventManager> m_mouseEventManager;
     Member<PointerEventManager> m_pointerEventManager;
 
     // Set on GestureTapDown if the |pointerdown| event corresponding to the