Fixed WebDragData's wrong dependency.

public/platform/WebDragData.h

Index: public/platform/WebDragData.h
diff --git a/public/platform/WebDragData.h b/public/platform/WebDragData.h
index 4a63bb0e6c49e448a0b0952f34afebec7d46bcad..32c53ce35d7ddc5a23c138afada4c08a309c5c47 100644
--- a/public/platform/WebDragData.h
+++ b/public/platform/WebDragData.h
@@ -91,7 +91,14 @@ public:
         assign(object);
         return *this;
     }
-    ~WebDragData() { reset(); }
+    ~WebDragData()
+    {
+#if BLINK_IMPLEMENTATION
+        m_private.reset();
+#else
+        reset();
+#endif
+    }
 
     bool isNull() const { return m_private.isNull(); }
 
@@ -107,9 +114,22 @@ public:
     BLINK_EXPORT void setFilesystemId(const WebString&);
 
 #if BLINK_IMPLEMENTATION
-    explicit WebDragData(const PassRefPtrWillBeRawPtr<DataObject>&);
-    WebDragData& operator=(const PassRefPtrWillBeRawPtr<DataObject>&);
-    DataObject* getValue() const;
+    // FIXME: to avoid "core depends on web", use inline here.

[tkent, 2015/02/18 02:17:57]

The problem is "platform depends on core", not "core depends on web".
We should do:

- Remove DataObject dependency from WebDragData.
  Now WebDragData is a wrapper of DataObject.  We should change it so that
WebDragData contains real data.

- Move WebDragData.cpp from Source/web/ to Source/platform/exported/.

[tasak, 2015/02/23 09:20:33]

Done.

+    // After merging blink repository with content repository, redesign
+    // how core works with web and content.
+    explicit WebDragData(const PassRefPtrWillBeRawPtr<DataObject>& object)
+    {
+        m_private = object;
+    }
+    WebDragData& operator=(const PassRefPtrWillBeRawPtr<DataObject>& object)
+    {
+        m_private = object;
+        return *this;
+    }
+    DataObject* getValue() const
+    {
+        return m_private.get();
+    }
 #endif
 
 private: