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

chrome/browser/BUILD.gn

Index: chrome/browser/BUILD.gn
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index 9ab4837d9ce8d51652e7a5cebeef149e53d16064..eb8f46606d2dddaef60baf4af46e110dece76ccf 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -2125,7 +2125,9 @@ split_static_library("browser") {
         "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",
@@ -2597,6 +2599,7 @@ split_static_library("browser") {
       "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",
@@ -2691,6 +2694,7 @@ split_static_library("browser") {
       "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",