https://bugs.webkit.org/show_bug.cgi?id=99635

Reviewed by Sam Weinig.

PDFPlugin should only handle page scale factor changes itself if it's in the main frame.
Subframe PDFs will act like images, zooming with the page.

* WebProcess/Plugins/PDF/PDFPlugin.h:
(PDFPlugin): Move implementation of handlesPageScaleFactor() to PDFPlugin.mm.
* WebProcess/Plugins/PDF/PDFPlugin.mm:
(WebKit::PDFPlugin::pdfDocumentDidLoad): Only copy PDFLayerController's default autoscale magnification to PluginView's
notion of the current scale factor if we're supposed to be handling page scale factor changes.
(WebKit::PDFPlugin::geometryDidChange): Only update PDFLayerController's magnification from the page scale factor
if we're supposed to be handling page scale factor changes.
(WebKit::PDFPlugin::handlesPageScaleFactor): We should only handle page scale factor changes if we're in the main frame.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@132512 268f45cc-cd09-0410-ab3c-d52691b4dbfc