Reland of Extracting placeholder information from Webkit to Blimp

content/public/browser/render_frame_host.h

Index: content/public/browser/render_frame_host.h
diff --git a/content/public/browser/render_frame_host.h b/content/public/browser/render_frame_host.h
index 39ef3676631ec7140d4d141398cab27bbf795619..d1dbaa6f00f621bffc348ac039c34b60d45120c1 100644
--- a/content/public/browser/render_frame_host.h
+++ b/content/public/browser/render_frame_host.h
@@ -40,6 +40,9 @@
 class RenderWidgetHostView;
 class SiteInstance;
 struct FileChooserFileInfo;
+struct FormFieldData;
+
+using FormFieldDataCallback = base::Callback<void(const FormFieldData&)>;
 
 // The interface provides a communication conduit with a frame in the renderer.
 class CONTENT_EXPORT RenderFrameHost : public IPC::Listener,
@@ -222,6 +225,9 @@
       const TextSurroundingSelectionCallback& callback,
       int max_length) = 0;
 
+  // Retrieves the text input info associated with the current form field.
+  virtual void RequestFocusedFormFieldData(FormFieldDataCallback& callback) = 0;
+
  private:
   // This interface should only be implemented inside content.
   friend class RenderFrameHostImpl;