Remove usage of to-be-deprecated APIs from samples

BUG=v8:4134
R=vogelheim@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/1219133004

Cr-Commit-Position: refs/heads/master@{#29452}

samples/hello-world.cc

@@ -47,13 +47,15 @@ int main(int argc, char* argv[]) {
     Context::Scope context_scope(context);
 
     // Create a string containing the JavaScript source code.
-    Local<String> source = String::NewFromUtf8(isolate, "'Hello' + ', World!'");
+    Local<String> source =
+        String::NewFromUtf8(isolate, "'Hello' + ', World!'",
+                            NewStringType::kNormal).ToLocalChecked();
 
     // Compile the source code.
-    Local<Script> script = Script::Compile(source);
+    Local<Script> script = Script::Compile(context, source).ToLocalChecked();
 
     // Run the script to get the result.
-    Local<Value> result = script->Run();
+    Local<Value> result = script->Run(context).ToLocalChecked();
 
     // Convert the result to an UTF8 string and print it.
     String::Utf8Value utf8(result);

samples/samples.gyp

@@ -40,6 +40,10 @@
     'include_dirs': [
       '..',
     ],
+    'defines': [
+      # TODO(jochen): Remove again after this is globally turned on.
+      'V8_IMMINENT_DEPRECATION_WARNINGS',
+    ],
     'conditions': [
       ['v8_enable_i18n_support==1', {
         'dependencies': [