Remove stray dependencies in pdf/BUILD.gn.

- out_of_process_instance target doesn't use //base:i18n.
- internal target doesn't use //pdf/pdfium/fuzzers, but once that
  dependency gets removed, //pdf/pdfium/fuzzers is no longer in GN's
  build graph. Fix that by adding it to the "gn_all" target.

Change-Id: I811f085ce5666fcf353d2cb429e52a84e1fbd1f6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2967774
Reviewed-by: Daniel Hosseinian <dhoss@chromium.org>
Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#894312}

BUILD.gn

@@ -292,7 +292,10 @@ group("gn_all") {
   }
 
   if (enable_pdf) {
-    deps += [ "//third_party/pdfium/samples:pdfium_test" ]
+    deps += [
+      "//pdf/pdfium/fuzzers",
+      "//third_party/pdfium/samples:pdfium_test",
+    ]
   }
 
   if (enable_remoting) {

pdf/BUILD.gn

@@ -188,7 +188,6 @@ if (enable_pdf) {
       "//gin",
       "//net",
       "//pdf:buildflags",
-      "//pdf/pdfium/fuzzers",
       "//ppapi/cpp:objects",
       "//ppapi/cpp/private:internal_module",
       "//printing",
@@ -319,7 +318,6 @@ if (enable_pdf) {
       ":internal",
       ":ppapi_migration",
       "//base",
-      "//base:i18n",
       "//build:chromeos_buildflags",
       "//net",
       "//pdf:buildflags",