Extract more of the mouse logic from EventHandler

third_party/WebKit/Source/core/input/KeyboardEventManager.cpp

Index: third_party/WebKit/Source/core/input/KeyboardEventManager.cpp
diff --git a/third_party/WebKit/Source/core/input/KeyboardEventManager.cpp b/third_party/WebKit/Source/core/input/KeyboardEventManager.cpp
index dcac6a6952f0986b5f7d9da32802195486e4553f..97be202fb4a440560578ff8b22145c7e0411bd57 100644
--- a/third_party/WebKit/Source/core/input/KeyboardEventManager.cpp
+++ b/third_party/WebKit/Source/core/input/KeyboardEventManager.cpp
@@ -56,6 +56,11 @@ KeyboardEventManager::KeyboardEventManager(LocalFrame* frame,
                                            ScrollManager* scrollManager)
     : m_frame(frame), m_scrollManager(scrollManager) {}
 
+DEFINE_TRACE(KeyboardEventManager) {
+  visitor->trace(m_frame);
+  visitor->trace(m_scrollManager);
+}
+
 bool KeyboardEventManager::handleAccessKey(const WebKeyboardEvent& evt) {
   // FIXME: Ignoring the state of Shift key is what neither IE nor Firefox do.
   // IE matches lower and upper case access keys regardless of Shift key state - but if both upper and
@@ -310,11 +315,6 @@ void KeyboardEventManager::defaultEscapeEventHandler(KeyboardEvent* event) {
     dialog->dispatchEvent(Event::createCancelable(EventTypeNames::cancel));
 }
 
-DEFINE_TRACE(KeyboardEventManager) {
-  visitor->trace(m_frame);
-  visitor->trace(m_scrollManager);
-}
-
 static OverrideCapsLockState s_overrideCapsLockState;
 
 void KeyboardEventManager::setCurrentCapsLockState(