Roll DEPS for build to b73bafdd.

Also roll:
buildtools to adb8bf4e.
skia to 3ee255f2.
v8 to 3d96d7ee.

And make tweaks to get it all working.

Review-Url: https://codereview.chromium.org/2283883002
diff --git a/BUILD.gn b/BUILD.gn
index ad7b5d1..8efaf04 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -706,6 +706,8 @@
     "core/fxcrt/plex.h",
     "core/fxcrt/xml_int.h",
   ]
+  configs += [ ":pdfium_core_config" ]
+
   if (pdf_enable_xfa) {
     sources += [
       "core/fxcrt/fx_arabic.cpp",
@@ -714,7 +716,6 @@
       "core/fxcrt/include/fx_arb.h",
     ]
   }
-  configs += [ ":pdfium_core_config" ]
 }
 
 static_library("fxge") {
@@ -1691,6 +1692,8 @@
     "//testing/gtest",
   ]
   include_dirs = [ "testing/gmock/include" ]
+  configs += [ ":pdfium_core_config" ]
+
   if (pdf_enable_v8) {
     sources += [
       "fpdfsdk/javascript/public_methods_embeddertest.cpp",
@@ -1701,7 +1704,6 @@
     deps += [ ":fxjs" ]
     configs += [ "//v8:external_startup_data" ]
   }
-  configs += [ ":pdfium_core_config" ]
   if (is_android) {
     ignore_all_data_deps = true
     use_raw_android_executable = true