HTML Media Capture: update capture attribute to use string.

third_party/WebKit/Source/web/ChromeClientImpl.cpp

Index: third_party/WebKit/Source/web/ChromeClientImpl.cpp
diff --git a/third_party/WebKit/Source/web/ChromeClientImpl.cpp b/third_party/WebKit/Source/web/ChromeClientImpl.cpp
index 8a65a6acd008811b11c2dd8117821645598c67cf..594039c86f3461ac9291452b0adc621a9a2f7cce 100644
--- a/third_party/WebKit/Source/web/ChromeClientImpl.cpp
+++ b/third_party/WebKit/Source/web/ChromeClientImpl.cpp
@@ -726,7 +726,10 @@ void ChromeClientImpl::OpenFileChooser(LocalFrame* frame,
   params.directory = file_chooser->GetSettings().allows_directory_upload;
   params.accept_types = file_chooser->GetSettings().AcceptTypes();
   params.selected_files = file_chooser->GetSettings().selected_files;
-  params.use_media_capture = file_chooser->GetSettings().use_media_capture;
+  if (RuntimeEnabledFeatures::mediaCaptureEnabled())
+    params.capture = file_chooser->GetSettings().capture;
+  else
+    params.capture = WebString();
   params.need_local_path = file_chooser->GetSettings().allows_directory_upload;
   params.requestor = frame->GetDocument()->Url();