Support dragging texts out of webview/Chrome.

content/browser/android/content_view_core_impl.h

Index: content/browser/android/content_view_core_impl.h
diff --git a/content/browser/android/content_view_core_impl.h b/content/browser/android/content_view_core_impl.h
index 0cc3c7e22693bbd012f6306331ae2cd54b329484..979be73443f95243479ec7f68a9736ad5220b0b7 100644
--- a/content/browser/android/content_view_core_impl.h
+++ b/content/browser/android/content_view_core_impl.h
@@ -34,6 +34,7 @@ struct ViewportSelectionBound;
 }
 
 namespace ui {
+class ImageSkia;
 class WindowAndroid;
 }
 
@@ -300,6 +301,9 @@ class ContentViewCoreImpl : public ContentViewCore,
   // Public methods that call to Java via JNI
   // --------------------------------------------------------------------------
 
+  void StartDragging(const base::string16& dragged_text,
+                     const gfx::ImageSkia& image);
+
   void OnSmartClipDataExtracted(const base::string16& text,
                                 const base::string16& html,
                                 const gfx::Rect& clip_rect);