Add missing .h files to .gn files that have a .cc file next to it in the gn file already.

chrome/browser/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 2107 matching lines @@
         "safe_browsing/client_side_model_loader.h",
         "safe_browsing/download_feedback.cc",
         "safe_browsing/download_feedback.h",
         "safe_browsing/download_feedback_service.cc",
         "safe_browsing/download_feedback_service.h",
         "safe_browsing/download_protection_service.cc",
         "safe_browsing/download_protection_service.h",
         "safe_browsing/incident_reporting/binary_integrity_analyzer.cc",
         "safe_browsing/incident_reporting/binary_integrity_analyzer.h",
         "safe_browsing/incident_reporting/binary_integrity_analyzer_mac.cc",
+        "safe_browsing/incident_reporting/binary_integrity_analyzer_mac.h",
         "safe_browsing/incident_reporting/binary_integrity_analyzer_win.cc",
+        "safe_browsing/incident_reporting/binary_integrity_analyzer_win.h",
         "safe_browsing/incident_reporting/binary_integrity_incident.cc",
         "safe_browsing/incident_reporting/binary_integrity_incident.h",
         "safe_browsing/incident_reporting/blacklist_load_analyzer.cc",
         "safe_browsing/incident_reporting/blacklist_load_analyzer.h",
         "safe_browsing/incident_reporting/blacklist_load_analyzer_win.cc",
         "safe_browsing/incident_reporting/blacklist_load_incident.cc",
         "safe_browsing/incident_reporting/blacklist_load_incident.h",
         "safe_browsing/incident_reporting/delayed_analysis_callback.h",
         "safe_browsing/incident_reporting/delayed_callback_runner.cc",
         "safe_browsing/incident_reporting/delayed_callback_runner.h",
@@ skipping 451 matching lines @@
       "android/bottombar/overlay_panel_content.h",
       "android/browsing_data/browsing_data_counter_bridge.cc",
       "android/browsing_data/browsing_data_counter_bridge.h",
       "android/browsing_data/url_filter_bridge.cc",
       "android/browsing_data/url_filter_bridge.h",
       "android/chrome_application.cc",
       "android/chrome_application.h",
       "android/chrome_backup_agent.cc",
       "android/chrome_backup_agent.h",
       "android/chrome_backup_watcher.cc",
+      "android/chrome_backup_watcher.h",
       "android/chrome_context_util.cc",
       "android/chrome_context_util.h",
       "android/chrome_feature_list.cc",
       "android/chrome_feature_list.h",
       "android/chrome_jni_registrar.cc",
       "android/chrome_jni_registrar.h",
       "android/chrome_startup_flags.cc",
       "android/chrome_startup_flags.h",
       "android/compositor/compositor_view.cc",
       "android/compositor/compositor_view.h",
@@ skipping 74 matching lines @@
       "android/data_usage/external_data_use_observer_bridge.h",
       "android/data_usage/external_data_use_reporter.cc",
       "android/data_usage/external_data_use_reporter.h",
       "android/data_usage/tab_data_use_entry.cc",
       "android/data_usage/tab_data_use_entry.h",
       "android/devtools_manager_delegate_android.cc",
       "android/devtools_manager_delegate_android.h",
       "android/devtools_server.cc",
       "android/devtools_server.h",
       "android/document/document_web_contents_delegate.cc",
+      "android/document/document_web_contents_delegate.h",
       "android/dom_distiller/distiller_ui_handle_android.cc",
       "android/dom_distiller/distiller_ui_handle_android.h",
       "android/download/android_download_manager_duplicate_infobar_delegate.cc",
       "android/download/android_download_manager_duplicate_infobar_delegate.h",
       "android/download/chrome_download_delegate.cc",
       "android/download/chrome_download_delegate.h",
       "android/download/chrome_duplicate_download_infobar_delegate.cc",
       "android/download/chrome_duplicate_download_infobar_delegate.h",
       "android/download/dangerous_download_infobar_delegate.cc",
       "android/download/dangerous_download_infobar_delegate.h",
@@ skipping 1884 matching lines @@
       "media/pepper_cdm_test_constants.cc",
       "media/pepper_cdm_test_constants.h",
     ]
   }
 }
 
 service_manifest("preferences_manifest") {
   name = "preferences"
   source = "prefs/preferences_manifest.json"
 }