Reland r50057. This is exactly the same except with two lines cherrypicked from

chrome/chrome_browser.gypi

Index: chrome/chrome_browser.gypi
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index 38d609c9cdfb88159a289c2c47a55b77279fd590..764124d7ed91a4c2385bcd9ca199ea8f560da721 100755
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -17,7 +17,6 @@
         'chrome_version_info',
         'component_extensions',
         'domui_shared_resources',
-        'net_internals_resources',
         'platform_locale_settings',
         'profile_import',
         'browser/sync/protocol/sync_proto.gyp:sync_proto_cpp',
@@ -2680,8 +2679,9 @@
         'browser/zygote_host_linux.cc',
         'browser/zygote_main_linux.cc',
 
-        # This file is generated by GRIT.
+        # These files are generated by GRIT.
         '<(grit_out_dir)/grit/theme_resources_map.cc',
+        '<(grit_out_dir)/grit/net_internals_resources_map.cc',
       ],
       'conditions': [
         ['javascript_engine=="v8"', {
@@ -3548,39 +3548,6 @@
       ],
     },
     {
-      'target_name': 'net_internals_resources',
-      'type': 'none',
-      # TODO(eroman): Once the msvs port supports it, change this to recursively
-      # copy the entire directory instead of listing the files.
-      # http://code.google.com/p/gyp/issues/detail?id=143.
-      'copies': [
-        {
-          'destination': '<(PRODUCT_DIR)/resources/net_internals',
-          'files': [
-            'browser/resources/net_internals/dataview.js',
-            'browser/resources/net_internals/detailsview.js',
-            'browser/resources/net_internals/dnsview.js',
-            'browser/resources/net_internals/httpcacheview.js',
-            'browser/resources/net_internals/index.html',
-            'browser/resources/net_internals/loggrouper.js',
-            'browser/resources/net_internals/logviewpainter.js',
-            'browser/resources/net_internals/main.css',
-            'browser/resources/net_internals/main.js',
-            'browser/resources/net_internals/proxyview.js',
-            'browser/resources/net_internals/requestsview.js',
-            'browser/resources/net_internals/resizableverticalsplitview.js',
-            'browser/resources/net_internals/sourceentry.js',
-            'browser/resources/net_internals/tabswitcherview.js',
-            'browser/resources/net_internals/testview.js',
-            'browser/resources/net_internals/timelineviewpainter.js',
-            'browser/resources/net_internals/topmidbottomview.js',
-            'browser/resources/net_internals/util.js',
-            'browser/resources/net_internals/view.js',
-          ]
-        },
-      ]
-    },
-    {
       # Protobuf compiler / generate rule for feedback
       'target_name': 'userfeedback_proto',
       'type': 'none',