Adding a command-line flag to set MHTML generation options.

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 61d12bc6e1d1466f2e4b915cbb0adb6dca7e454e..e6fc71327c1e68d9a293f1a1269c959fc4bf9b52 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -308,6 +308,14 @@ const FeatureEntry::Choice kGpuRasterizationMSAASampleCountChoices[] = {
     switches::kGpuRasterizationMSAASampleCount, "16" },
 };
 
+const FeatureEntry::Choice kMHTMLGeneratorOptionChoices[] = {
+  { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", "" },
+  { IDS_FLAGS_MHTML_SKIP_NOSTORE_MAIN,
+    switches::kMHTMLGeneratorOption, switches::kMHTMLSkipNostoreMain },
+  { IDS_FLAGS_MHTML_SKIP_NOSTORE_ALL,
+    switches::kMHTMLGeneratorOption, switches::kMHTMLSkipNostoreAll },
+};
+
 const FeatureEntry::Choice kEnableGpuRasterizationChoices[] = {
   { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", "" },
   { IDS_GENERIC_EXPERIMENT_CHOICE_ENABLED,
@@ -693,6 +701,10 @@ const FeatureEntry kFeatureEntries[] = {
      IDS_FLAGS_SAVE_PAGE_AS_MHTML_NAME,
      IDS_FLAGS_SAVE_PAGE_AS_MHTML_DESCRIPTION, kOsMac | kOsWin | kOsLinux,
      SINGLE_VALUE_TYPE(switches::kSavePageAsMHTML)},
+    {"mhtml-generator-option",
+     IDS_FLAGS_MHTML_GENERATOR_OPTION_NAME,
+     IDS_FLAGS_MHTML_GENERATOR_OPTION_DESCRIPTION, kOsMac | kOsWin | kOsLinux,
+     MULTI_VALUE_TYPE(kMHTMLGeneratorOptionChoices)},
     {"enable-quic", IDS_FLAGS_QUIC_NAME, IDS_FLAGS_QUIC_DESCRIPTION, kOsAll,
      ENABLE_DISABLE_VALUE_TYPE(switches::kEnableQuic, switches::kDisableQuic)},
     {"enable-alternative-services", IDS_FLAGS_ALTSVC_NAME,