Add a flag to show if the FileChooserCompletion needs local paths or not.

public/web/WebFileChooserParams.h

Index: public/web/WebFileChooserParams.h
diff --git a/public/web/WebFileChooserParams.h b/public/web/WebFileChooserParams.h
index 2f8f40c652c034267c86c17768f630028166fe25..f4ceb3a245bccdc9bd0a5899633bb85f5a83ac29 100644
--- a/public/web/WebFileChooserParams.h
+++ b/public/web/WebFileChooserParams.h
@@ -71,6 +71,10 @@ struct WebFileChooserParams {
     // provided for compatibility reasons.
     WebString capture;
     bool useMediaCapture;
+    // Whether FileChooserCompletion needs local paths or not. The

[tkent, 2014/10/15 08:58:12]

What is FileChooserCompletion?  Do you mean WebFileChooserCompletion?

[hirono, 2014/10/15 09:26:51]

Yes. Updated the comment.

+    // implementation of FileChooserCompletion that can handle files without
+    // local path specifies false to the flag.

[tkent, 2014/10/15 08:58:12]

Does it mean |needLocalPath| is updated outside of
ChromeClientImpl::runOpenPanel?

[hirono, 2014/10/15 09:26:51]

No, if the flag is set once, it will not be updated.

WebFileChooserCompletion has two implementations: WebFileChooserCompletionImpl
and PepperFileChooserHost.

For WebFileChooserCompletionImpl, we specify the value to the flag in
ChromeClientImpl::runOpenPanel.
For PepperFileChooserHost, I'm going to specify true to the flag at the outside
of blink.

https://code.google.com/p/chromium/codesearch#chromium/src/content/renderer/p...

Updated the comment.

[tkent, 2014/10/16 00:39:02]

Thanks. I understand.

+    bool needLocalPath;
 
     WebFileChooserParams()
         : multiSelect(false)