Pass v8::Isolate to PDFium at init time.

Move the external isolate and embedder slot from the
IPDF_JSPlatforms struct supplied at the
FPDFDOC_InitFormFillEnvironment() call time to arguments to
the FPDF_InitLibraryWithConfig() call.

This has several benefits:
-- Avoids the crash that could happen if multiple
FPDFDOC_InitFormFillEnvironmen() calls should happen to be
made by an embedder with different slot values.
-- Down the road, for XFA, there may be XFA but no FormFill
environment.

We support both forms for the time being, until the chrome
side catches up, at which point we will deprecate the old
way.

R=thestig@chromium.org

Review URL: https://codereview.chromium.org/1367033002 .

1 files changed, 6 insertions, 1 deletions

diff --git a/fpdfsdk/include/jsapi/fxjs_v8.h b/fpdfsdk/include/jsapi/fxjs_v8.h
index 60fcea6341..1705b894cf 100644
--- a/fpdfsdk/include/jsapi/fxjs_v8.h
+++ b/fpdfsdk/include/jsapi/fxjs_v8.h
@@ -62,9 +62,14 @@ using FXJS_CONSTRUCTOR = void (*)(IFXJS_Context* cc,
 using FXJS_DESTRUCTOR = void (*)(v8::Local<v8::Object> obj);
 
 // Call before making FXJS_PrepareIsolate call.
-void FXJS_Initialize(unsigned int embedderDataSlot);
+void FXJS_Initialize(unsigned int embedderDataSlot, v8::Isolate* pIsolate);
 void FXJS_Release();
 
+// Gets the global isolate set by FXJS_Initialize(), or makes a new one each
+// time if there is no such isolate. Returns true if a new isolate had to be
+// created.
+bool FXJS_GetIsolate(v8::Isolate** pResultIsolate);
+
 // Call before making FXJS_Define* calls. Resources allocated here are cleared
 // as part of FXJS_ReleaseRuntime().
 void FXJS_PrepareIsolate(v8::Isolate* pIsolate);