Combine PDF plugin into the Chromium binary.

chrome/BUILD.gn

Index: chrome/BUILD.gn
diff --git a/chrome/BUILD.gn b/chrome/BUILD.gn
index b323084135768a3d6320fb82aff91963cfd2a94f..ca8267cc296066dbaf12a9c56d1c72b2b70d935c 100644
--- a/chrome/BUILD.gn
+++ b/chrome/BUILD.gn
@@ -150,10 +150,8 @@ if (!is_android && (!is_win || link_chrome_on_windows)) {
       # TODO(GYP) some stuff from GYP including chrome_multiple_dll.
     }
 
-    if (!is_mac) {
-      # On Mac this is done in chrome_dll.gypi.
-      datadeps += [ "//pdf" ]
-      # TODO(GYP) pdf linux symbols
+    if (enable_plugins) {
+      deps += [ "//pdf" ]
     }
   }
 }  # !is_android
@@ -237,6 +235,10 @@ if (!is_win || link_chrome_on_windows) {
       #}],
       # TODO(GYP) Lots of other stuff in the OS=="mac" block.
     }
+
+    if (enable_plugins) {
+      deps += [ "//pdf" ]
+    }
   }
 }