Move clipboard-related webkit_glue embedder functions into a ClipboardClient interface.

webkit/glue/webclipboard_impl.h

Index: webkit/glue/webclipboard_impl.h
diff --git a/webkit/glue/webclipboard_impl.h b/webkit/glue/webclipboard_impl.h
index b4ac1e4cc9bf5b196965098597c0ff914948e82c..c1514f2858a23fdc7c58a15b8926b4bf36afd0a3 100644
--- a/webkit/glue/webclipboard_impl.h
+++ b/webkit/glue/webclipboard_impl.h
@@ -11,6 +11,7 @@
 #include <string>
 
 namespace webkit_glue {
+class ClipboardClient;
 
 class WebClipboardImpl : public WebKit::WebClipboard {
  public:
@@ -19,6 +20,8 @@ class WebClipboardImpl : public WebKit::WebClipboard {
   static std::string URLToImageMarkup(const WebKit::WebURL& url,
       const WebKit::WebString& title);
 
+  explicit WebClipboardImpl(ClipboardClient* client);
+
   virtual ~WebClipboardImpl();
 
   // WebClipboard methods:
@@ -51,6 +54,7 @@ class WebClipboardImpl : public WebKit::WebClipboard {
 
  private:
   bool ConvertBufferType(Buffer, ui::Clipboard::Buffer*);
+  ClipboardClient* client_;
 };
 
 }  // namespace webkit_glue