fix: build and expose inspector agent

Node inspector initialization happens in a different start-up function in node.cc, which we don't call in Electron. This allows for us to use the inspector agent in electron/atom/browser/node_debugger.cc

node.gyp

@@ -524,8 +524,8 @@
             'v8_inspector_compress_protocol_json#host',
           ],
           'include_dirs': [
-            '<(SHARED_INTERMEDIATE_DIR)/include', # for inspector
-            '<(SHARED_INTERMEDIATE_DIR)',
+            # '<(SHARED_INTERMEDIATE_DIR)/include', # for inspector
+            # '<(SHARED_INTERMEDIATE_DIR)',
             '<(SHARED_INTERMEDIATE_DIR)/src', # for inspector
           ],
         }, {

src/inspector_agent.cc

@@ -376,7 +376,7 @@ class NodeInspectorClient : public V8InspectorClient {
   explicit NodeInspectorClient(node::Environment* env) : env_(env) {
     client_ = V8Inspector::create(env->isolate(), this);
     // TODO(bnoordhuis) Make name configurable from src/node.cc.
-    ContextInfo info(GetHumanReadableProcessName());
+    ContextInfo info("Electron Main Context");
     info.is_default = true;
     contextCreated(env->context(), info);
   }

src/inspector_agent.h

@@ -11,8 +11,10 @@
 #error("This header can only be used when inspector is enabled")
 #endif
 
+#include "node.h"
 #include "node_options.h"
 #include "node_persistent.h"
+#include "node_platform.h"
 #include "v8.h"
 
 namespace v8_inspector {
@@ -41,7 +43,7 @@ class InspectorSessionDelegate {
                                      = 0;
 };
 
-class Agent {
+class NODE_EXTERN Agent {
  public:
   explicit Agent(node::Environment* env);
   ~Agent();

src/inspector_io.cc

@@ -12,6 +12,8 @@
 #include "util.h"
 #include "zlib.h"
 
+#include "libplatform/libplatform.h"
+
 #include <deque>
 #include <string.h>
 #include <vector>