Add WebDragData to blink::WebView::dragtargetDrop

third_party/WebKit/Source/core/clipboard/DataObject.h

Index: third_party/WebKit/Source/core/clipboard/DataObject.h
diff --git a/third_party/WebKit/Source/core/clipboard/DataObject.h b/third_party/WebKit/Source/core/clipboard/DataObject.h
index 19133ae5d69c1da7ee91d371487c0531e2cdf7d8..958ca4a951586a15d8eec084dbe4ec650d563134 100644
--- a/third_party/WebKit/Source/core/clipboard/DataObject.h
+++ b/third_party/WebKit/Source/core/clipboard/DataObject.h
@@ -96,6 +96,8 @@ public:
     int modifiers() const { return m_modifiers; }
     void setModifiers(int modifiers) { m_modifiers = modifiers; }
 
+    bool canReadContent() const { return m_canReadContent; }
+
     DECLARE_TRACE();
 
     WebDragData toWebDragData();
@@ -112,6 +114,8 @@ private:
     // State of Shift/Ctrl/Alt/Meta keys and Left/Right/Middle mouse buttons
     int m_modifiers;
     String m_filesystemId;
+
+    bool m_canReadContent;

[dcheng, 2016/03/30 08:40:02]

This shouldn't be necessary, DataTransfer/DataTransferItemList/DataTransferItem
already have an access policy enum:
https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit...

which enforces that only types can be read in dragenter / dragover, etc.

[hush (inactive), 2016/04/06 22:47:51]

Yeah. Removed.

 };
 
 } // namespace blink