Add Page, Runtime, Debugger agents

Summary: Runtime and Debugger agents are shipped with JSC so we reuse them. Messages are routed to them through the `LegacyDispatcher` which also handles translating their events. The Page agent emits the `Page.getResourceTree` method that the Chrome inspector expects.

Reviewed By: michalgr

Differential Revision: D4021499

fbshipit-source-id: a93d0add01cee732401f8e8db1d43205bfbd4cd4

ReactCommon/inspector/LegacyAgents.cpp

@@ -0,0 +1,35 @@
+// Copyright 2004-present Facebook. All Rights Reserved.
+
+#include "LegacyAgents.h"
+
+#include "LegacyInspectorEnvironment.h"
+#include "LegacyRuntimeAgent.h"
+#include "LegacyDebuggerAgent.h"
+
+#include <JavaScriptCore/config.h>
+#include <JavaScriptCore/JSGlobalObject.h>
+#include <folly/Memory.h>
+
+namespace facebook {
+namespace react {
+
+using namespace Inspector;
+
+LegacyAgents::LegacyAgents(
+  JSC::JSGlobalObject& globalObject,
+  std::unique_ptr<LegacyInspectorEnvironment> environment,
+  ConsoleAgent* consoleAgent)
+    : LegacyDispatcher(globalObject)
+    , environment_(std::move(environment)) {
+  auto injectedScriptManager = environment_->injectedScriptManager();
+  auto runtimeAgent = folly::make_unique<LegacyRuntimeAgent>(injectedScriptManager, globalObject);
+  auto debuggerAgent = folly::make_unique<LegacyDebuggerAgent>(injectedScriptManager, globalObject, consoleAgent);
+
+  runtimeAgent->setScriptDebugServer(&debuggerAgent->scriptDebugServer());
+
+  addAgent("Runtime", std::move(runtimeAgent));
+  addAgent("Debugger", std::move(debuggerAgent));
+}
+
+}
+}