HTML Media Capture: update capture attribute to use string.

third_party/WebKit/public/web/WebFileChooserParams.h

Index: third_party/WebKit/public/web/WebFileChooserParams.h
diff --git a/third_party/WebKit/public/web/WebFileChooserParams.h b/third_party/WebKit/public/web/WebFileChooserParams.h
index 06c2c915e287a1f7b1e127aea39b1b73ea3a1c3e..24d0dbc795891f3849ba30a5ad67e702f721b63e 100644
--- a/third_party/WebKit/public/web/WebFileChooserParams.h
+++ b/third_party/WebKit/public/web/WebFileChooserParams.h
@@ -63,13 +63,8 @@ struct WebFileChooserParams {
   //  - replacing with other files
   // before opening a file chooser dialog.
   WebVector<WebString> selected_files;
-  // See http://www.w3.org/TR/html-media-capture/ for the semantics of the
-  // capture attribute. If |useMediaCapture| is true, the media types
-  // indicated in |acceptTypes| should be obtained from the device's
-  // environment using a media capture mechanism. |capture| is deprecated and
-  // provided for compatibility reasons.
+  // https://w3c.github.io/html-media-capture/#dom-htmlinputelement-capture.
   WebString capture;
-  bool use_media_capture;
   // Whether WebFileChooserCompletion needs local paths or not. If the result
   // of file chooser is handled by the implementation of
   // WebFileChooserCompletion that can handle files without local paths,
@@ -83,7 +78,6 @@ struct WebFileChooserParams {
       : multi_select(false),
         directory(false),
         save_as(false),
-        use_media_capture(false),
         need_local_path(true) {}
 };