[PDF Viewer] Add support for view destination with 'FitB' fitting type

Table 151 in ISO 32000-1 standard lists multiple view destination
parameters. Implement 'FitB' parameter, which displays the entire
bounding box of a given page.

This CL creates the following flow:
1. OpenPdfParamsParser parses the view parameters by using a
   GetPageBoundingBoxCallback.
2. GetPageBoundingBoxCallback uses PluginController to
   postMessageWithReply() to the PdfViewWebPlugin.
3. PdfViewWebPlugin utilizes a new API PDFiumPage::GetBoundingBox() to
   get the bounding box of a given page and returns it.
4. PDF Viewer handles the URL params and uses setFittingType() to zoom
   and move to the bounding box.

Bug: 1414864
Change-Id: I32f34df226f3cc5f69724d10726b5032471af9d6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4371251
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Nigi <nigi@chromium.org>
Commit-Queue: Andy Phan <andyphan@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1126928}

• chrome/browser/resources/pdf/constants.ts[diff]
• chrome/browser/resources/pdf/controller.ts[diff]
• chrome/browser/resources/pdf/open_pdf_params_parser.ts[diff]
• chrome/browser/resources/pdf/pdf_viewer_base.ts[diff]
• chrome/browser/resources/pdf/pdf_viewer_wrapper.ts[diff]
• chrome/browser/resources/pdf/viewport.ts[diff]
• chrome/test/data/pdf/navigator_test.ts[diff]
• chrome/test/data/pdf/params_parser_test.ts[diff]
• chrome/test/data/pdf/viewport_test.ts[diff]
• pdf/pdf_engine.h[diff]
• pdf/pdf_view_web_plugin.cc[diff]
• pdf/pdf_view_web_plugin.h[diff]
• pdf/pdfium/pdfium_engine.cc[diff]
• pdf/pdfium/pdfium_engine.h[diff]
• pdf/pdfium/pdfium_page.cc[diff]
• pdf/pdfium/pdfium_page.h[diff]
• pdf/pdfium/pdfium_page_unittest.cc[diff]
• pdf/test/data/blank.in[Added - diff]
• pdf/test/data/blank.pdf[Added - diff]
• pdf/test/data/rotated_multi_page.in[Added - diff]
• pdf/test/data/rotated_multi_page.pdf[Added - diff]
• pdf/test/data/rotated_multi_page_cropped.in[Added - diff]
• pdf/test/data/rotated_multi_page_cropped.pdf[Added - diff]