[cleanup] Replace deprecated V8 functions in v8_unit_test

Use the Context variant of BooleanValue since BooleanValue() is
deprecated and will be removed soon.

Change-Id: I425db1b31740586579cba22ebd394648a71b9bf5
Reviewed-on: https://chromium-review.googlesource.com/1152814Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#579734}

chrome/test/base/v8_unit_test.cc

@@ -132,7 +132,8 @@ bool V8UnitTest::RunJavascriptTestF(const std::string& test_fixture,
     return false;
 
   // Ok if ran successfully, passed tests, and didn't have console errors.
-  return result->BooleanValue() && g_test_result_ok && !g_had_errors;
+  return result->BooleanValue(context).ToChecked() && g_test_result_ok &&
+         !g_had_errors;
 }
 
 void V8UnitTest::InitPathsAndLibraries() {
@@ -325,7 +326,9 @@ void V8UnitTest::ChromeSend(const v8::FunctionCallbackInfo<v8::Value>& args) {
   EXPECT_EQ(2U, test_result->Length());
   if (::testing::Test::HasNonfatalFailure())
     return;
-  g_test_result_ok = test_result->Get(0)->BooleanValue();
+  g_test_result_ok = test_result->Get(0)
+                         ->BooleanValue(isolate->GetCurrentContext())
+                         .ToChecked();
   if (!g_test_result_ok) {
     v8::String::Utf8Value message(isolate, test_result->Get(1));
     LOG(ERROR) << *message;