Handle ctrl + shift + left click on links in PDF.

pdf/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
 import("//third_party/pdfium/pdfium.gni")
 
 assert(enable_pdf)
 
 pdf_engine = 0  # 0 PDFium
 
 static_library("pdf") {
   deps = [
     "//base",
     "//gin",
     "//net",
     "//ppapi/cpp:objects",
     "//ppapi/cpp/private:internal_module",
+    "//ui/base",
   ]
 
   sources = [
     "chunk_stream.cc",
     "chunk_stream.h",
     "document_loader.cc",
     "document_loader.h",
     "draw_utils.cc",
     "draw_utils.h",
     "out_of_process_instance.cc",
@@ skipping 32 matching lines @@
       "pdfium/pdfium_page.h",
       "pdfium/pdfium_range.cc",
       "pdfium/pdfium_range.h",
     ]
   }
 
   if (pdf_enable_xfa) {
     defines = [ "PDF_ENABLE_XFA" ]
   }
 }