Merge to XFA: Refactor fxjs_v8 and add embeddertests for it.

(cherry picked from commit b17d62601b21dfce85718e08cfd0ffce3a45d74e)
(cherry picked from commit 09ed30750282bf56a92d0e646ab22c64bea81a36)
Manual edits:
  fpdfsdk/src/jsapi/fxjs_v8_embeddertest.cpp - add lockers.
  fppdfsdk/src/javascript/JS_Runtime.cpp - rework XFA init path.

Original Review URL: https://codereview.chromium.org/1338073002 .

R=thestig@chromium.org

Review URL: https://codereview.chromium.org/1348433002 .

2 files changed, 95 insertions, 9 deletions

diff --git a/fpdfsdk/src/jsapi/fxjs_v8.cpp b/fpdfsdk/src/jsapi/fxjs_v8.cpp
index b0fd6fbb9f..135b5e9349 100644
--- a/fpdfsdk/src/jsapi/fxjs_v8.cpp
+++ b/fpdfsdk/src/jsapi/fxjs_v8.cpp
@@ -75,6 +75,23 @@ class CJS_ObjDefintion {
   v8::Global<v8::Object> m_StaticObj;
 };
 
+void* JS_ArrayBufferAllocator::Allocate(size_t length) {
+  return calloc(1, length);
+}
+
+void* JS_ArrayBufferAllocator::AllocateUninitialized(size_t length) {
+  return malloc(length);
+}
+
+void JS_ArrayBufferAllocator::Free(void* data, size_t length) {
+  free(data);
+}
+
+void JS_PrepareIsolate(v8::Isolate* pIsolate) {
+  if (!pIsolate->GetData(g_embedderDataSlot))
+    pIsolate->SetData(g_embedderDataSlot, new CFX_PtrArray());
+}
+
 int JS_DefineObj(v8::Isolate* pIsolate,
                  const wchar_t* sObjName,
                  FXJSOBJTYPE eObjType,
@@ -82,11 +99,9 @@ int JS_DefineObj(v8::Isolate* pIsolate,
                  LP_DESTRUCTOR pDestructor) {
   v8::Isolate::Scope isolate_scope(pIsolate);
   v8::HandleScope handle_scope(pIsolate);
+
+  JS_PrepareIsolate(pIsolate);
   CFX_PtrArray* pArray = (CFX_PtrArray*)pIsolate->GetData(g_embedderDataSlot);
-  if (!pArray) {
-    pArray = new CFX_PtrArray();
-    pIsolate->SetData(g_embedderDataSlot, pArray);
-  }
   CJS_ObjDefintion* pObjDef = new CJS_ObjDefintion(pIsolate, sObjName, eObjType,
                                                    pConstructor, pDestructor);
   pArray->Add(pObjDef);
@@ -243,10 +258,10 @@ void JS_DefineGlobalConst(v8::Isolate* pIsolate,
   globalObjTemp.Reset(pIsolate, objTemp);
 }
 
-void JS_InitialRuntime(v8::Isolate* pIsolate,
-                       IFXJS_Runtime* pFXRuntime,
-                       IFXJS_Context* context,
-                       v8::Global<v8::Context>& v8PersistentContext) {
+void JS_InitializeRuntime(v8::Isolate* pIsolate,
+                          IFXJS_Runtime* pFXRuntime,
+                          IFXJS_Context* context,
+                          v8::Global<v8::Context>& v8PersistentContext) {
   v8::Isolate::Scope isolate_scope(pIsolate);
   v8::Locker locker(pIsolate);
   v8::HandleScope handle_scope(pIsolate);
@@ -340,7 +355,7 @@ void JS_ReleaseRuntime(v8::Isolate* pIsolate,
   pIsolate->SetData(2, NULL);
 }
 
-void JS_Initial(unsigned int embedderDataSlot) {
+void JS_Initialize(unsigned int embedderDataSlot) {
   g_embedderDataSlot = embedderDataSlot;
 }
 
diff --git a/fpdfsdk/src/jsapi/fxjs_v8_embeddertest.cpp b/fpdfsdk/src/jsapi/fxjs_v8_embeddertest.cpp
new file mode 100644
index 0000000000..f45570b10f
--- /dev/null
+++ b/fpdfsdk/src/jsapi/fxjs_v8_embeddertest.cpp
@@ -0,0 +1,71 @@
+// Copyright 2015 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "../../../core/include/fpdfapi/fpdf_parser.h"
+#include "../../../testing/embedder_test.h"
+#include "../../include/fsdk_mgr.h"
+#include "../../include/javascript/JS_Runtime.h"
+#include "../../include/jsapi/fxjs_v8.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+const wchar_t kScript[] = L"fred = 7";
+
+}  // namespace
+
+class FXJSV8Embeddertest : public EmbedderTest {
+ public:
+  FXJSV8Embeddertest() : m_pIsolate(nullptr) {}
+  ~FXJSV8Embeddertest() override {}
+
+  void SetUp() override {
+    EmbedderTest::SetUp();
+    m_pAllocator.reset(new JS_ArrayBufferAllocator());
+
+    v8::Isolate::CreateParams params;
+    params.array_buffer_allocator = m_pAllocator.get();
+    m_pIsolate = v8::Isolate::New(params);
+
+    v8::Isolate::Scope isolate_scope(m_pIsolate);
+    v8::Locker locker(m_pIsolate);
+    v8::HandleScope handle_scope(m_pIsolate);
+    JS_Initialize(0);
+    JS_PrepareIsolate(m_pIsolate);
+    JS_InitializeRuntime(m_pIsolate, nullptr, nullptr, m_pPersistentContext);
+  }
+
+  void TearDown() override {
+    JS_ReleaseRuntime(m_pIsolate, m_pPersistentContext);
+    JS_Release();
+    EmbedderTest::TearDown();
+  }
+
+  v8::Isolate* isolate() const { return m_pIsolate; }
+  v8::Local<v8::Context> GetV8Context() {
+    return v8::Local<v8::Context>::New(m_pIsolate, m_pPersistentContext);
+  }
+
+ private:
+  v8::Isolate* m_pIsolate;
+  v8::Global<v8::Context> m_pPersistentContext;
+  nonstd::unique_ptr<v8::ArrayBuffer::Allocator> m_pAllocator;
+};
+
+TEST_F(FXJSV8Embeddertest, Getters) {
+  v8::Isolate::Scope isolate_scope(isolate());
+  v8::Locker locker(isolate());
+  v8::HandleScope handle_scope(isolate());
+  v8::Context::Scope context_scope(GetV8Context());
+
+  FXJSErr error;
+  CFX_WideString wsInfo;
+  CFX_WideString wsScript(kScript);
+  int sts = JS_Execute(isolate(), nullptr, kScript, wcslen(kScript), &error);
+  EXPECT_EQ(0, sts);
+
+  v8::Local<v8::Object> This = JS_GetThisObj(isolate());
+  v8::Local<v8::Value> fred = JS_GetObjectElement(isolate(), This, L"fred");
+  EXPECT_TRUE(fred->IsNumber());
+}