Merge DragClientImpl into core.

third_party/WebKit/Source/core/loader/EmptyClients.h

Index: third_party/WebKit/Source/core/loader/EmptyClients.h
diff --git a/third_party/WebKit/Source/core/loader/EmptyClients.h b/third_party/WebKit/Source/core/loader/EmptyClients.h
index 4a90fbd3e924842c4aceaa0a9a90509df26f9caf..630ab62feca408bb9f1095e2f5f23f269f64dea3 100644
--- a/third_party/WebKit/Source/core/loader/EmptyClients.h
+++ b/third_party/WebKit/Source/core/loader/EmptyClients.h
@@ -34,7 +34,6 @@
 #include "core/loader/FrameLoaderClient.h"
 #include "core/page/ChromeClient.h"
 #include "core/page/ContextMenuClient.h"
-#include "core/page/DragClient.h"
 #include "core/page/EditorClient.h"
 #include "core/page/Page.h"
 #include "core/page/SpellCheckerClient.h"
@@ -92,6 +91,9 @@ public:
 
     bool hadFormInteraction() const override { return false; }
 
+    void startDragging(LocalFrame*, const WebDragData&, WebDragOperationsMask, const WebImage& dragImage, const WebPoint& dragImageOffset) {}
+    bool acceptsLoadDrops() const override { return true; }
+
     void setToolbarsVisible(bool) override {}
     bool toolbarsVisible() override { return false; }
 
@@ -326,15 +328,6 @@ public:
     void clearContextMenu() override {}
 };
 
-class EmptyDragClient final : public DragClient {
-    WTF_MAKE_NONCOPYABLE(EmptyDragClient); USING_FAST_MALLOC(EmptyDragClient);
-public:
-    EmptyDragClient() {}
-    ~EmptyDragClient() override {}
-    DragDestinationAction actionMaskForDrag(DragData*) override { return DragDestinationActionNone; }
-    void startDrag(DragImage*, const IntPoint&, const IntPoint&, DataTransfer*, LocalFrame*, bool) override {}
-};
-
 CORE_EXPORT void fillWithEmptyClients(Page::PageClients&);
 
 } // namespace blink