Merge to XFA: Fix all relative includes to third_party.

- In non-standalone builds, use the provided jpeg library.
- Run gn format over all the GN files.
- Also roll DEPS for buildtools to c2f2598.
- And fix XFA's lack of #includes.

BUG=541704
R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1425153006 .

(cherry picked from commit 34bb6c58fe60206a08dc0a1f37b7cfe83e8c762c)

Review URL: https://codereview.chromium.org/1434543003 .
diff --git a/fpdfsdk/src/javascript/JS_Object.h b/fpdfsdk/src/javascript/JS_Object.h
index 5075152..8872a4e 100644
--- a/fpdfsdk/src/javascript/JS_Object.h
+++ b/fpdfsdk/src/javascript/JS_Object.h
@@ -9,10 +9,10 @@
 
 #include <map>
 
-#include "../../../third_party/base/nonstd_unique_ptr.h"
 #include "../../include/fsdk_define.h"  // For FX_UINT
 #include "../../include/jsapi/fxjs_v8.h"
 #include "JS_Runtime.h"
+#include "third_party/base/nonstd_unique_ptr.h"
 
 class CJS_Context;
 class CJS_Object;