Move some DocumentTabModel files upstream

chrome/chrome_browser.gypi

Index: chrome/chrome_browser.gypi
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index 91ee0d03f9d59af5ad1b358fb0160c2d688ea392..31bb637e10ea424f681cc0afabbe1f9631862b90 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -3700,6 +3700,20 @@
           },
           'includes': [ '../build/android/java_cpp_enum.gypi' ],
         },
+        {
+          # Protobuf compiler / generator for Android's DocumentTabModel
+          # protocol buffer.
+          # GN: //chrome/android: document_tab_model_info_proto_java
+          'target_name': 'document_tab_model_info_proto_java',
+          'type': 'none',
+          'variables': {
+            'proto_in_dir': 'android/java/src/org/chromium/chrome/browser/tabmodel/document',
+          },
+          'sources': [
+            '<(proto_in_dir)/document_tab_model_info.proto',
+          ],
+          'includes': ['../build/protoc_java.gypi'],
+        },
       ],
     },],
     ['enable_extensions==1', {