Combine PDF plugin into the Chromium binary.

chrome/test/BUILD.gn

Index: chrome/test/BUILD.gn
diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
index 8f5ab6cf163db878e752e6140e9719e10e111b3a..4ef658e18029b46780d205d7a0e6f47645b5e555 100644
--- a/chrome/test/BUILD.gn
+++ b/chrome/test/BUILD.gn
@@ -175,6 +175,7 @@ source_set("test_support") {
       "ppapi/ppapi_test.cc",
       "ppapi/ppapi_test.h",
     ]
+    deps += [ "//pdf" ]
   }
 
   if (use_ash) {
@@ -246,7 +247,6 @@ if (!is_android && (!is_win || link_chrome_on_windows)) {
       "//net",
       "//net:net_resources",
       "//net:test_support",
-      "//pdf",
 
       #"//ppapi:ppapi_tests",  # TODO(GYP) this doesn't exist yet.
       "//skia",