Change PDF quick view to use FitH

Change quick view embedding pdfium with option view=FitH instead of Fit.

"FitH" fits to width which makes the PDF visualization to be fluid when
resizing the window (feature requested on crbug.com/809314) also it
doesn't cause pdfium to flick due to resizing the width and height as
happens with option "Fit".

See bug for a screen cast of PDF visualization with FitH.

Bug: 837591
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I242c92eea948ecc3378a02d404d2772ca4779e34
Reviewed-on: https://chromium-review.googlesource.com/1063518Reviewed-by: Naoki Fukino <fukino@chromium.org>
Commit-Queue: Luciano Pacheco (SYD) <lucmult@chromium.org>
Cr-Commit-Position: refs/heads/master@{#559457}

ui/file_manager/file_manager/foreground/js/quick_view_controller.js

@@ -458,7 +458,7 @@ QuickViewController.prototype.getQuickViewParameters_ = function(
         params.browsable = browsable;
         params.contentUrl = browsable ? URL.createObjectURL(file) : '';
         if (params.subtype == 'PDF')
-          params.contentUrl += '#view=Fit';
+          params.contentUrl += '#view=FitH';
         return params;
       }.bind(this))
       .catch(function(e) {