Add SetImageData api to chrome.clipboard.

extensions/common/api/clipboard.idl

Index: extensions/common/api/clipboard.idl
diff --git a/extensions/common/api/clipboard.idl b/extensions/common/api/clipboard.idl
index 0b841b09b4a6191b7dba7ec1ede10969b74042f8..7c5f3d738b5cab12ea421a9bc24ed536dc1e129e 100644
--- a/extensions/common/api/clipboard.idl
+++ b/extensions/common/api/clipboard.idl
@@ -14,4 +14,16 @@ namespace clipboard {
     // document.execCommand('paste').
     static void onClipboardDataChanged();
   };
+
+  callback SetImageDataCallback = void(boolean success);
+
+  interface Functions {
+    // Sets image data to clipboard.
+    //
+    // |image_data|: The encoded image data.
+    // |type|: The image type,  the supported types are: "png", "jpeg".
+    static void setImageData(ArrayBuffer image_data,
+                             DOMString type,

[dcheng, 2016/10/04 05:13:27]

I'm not an extension IDL expert, but if we can somehow use an enum here, that
would be nicer than a string.

[jennyz, 2016/10/04 23:53:54]

Done.

+                             SetImageDataCallback callback);
+  };
 };