Show bubble to prompt UMA opt-in on crash recovery

BUG=293702

Review URL: https://codereview.chromium.org/224033002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@267223 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index e1e6d81..53d78fc 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -1679,6 +1679,13 @@
     SINGLE_VALUE_TYPE(switches::kEnablePermissionsBubbles)
   },
   {
+    "enable-session-crashed-bubble",
+    IDS_FLAGS_ENABLE_SESSION_CRASHED_BUBBLE_NAME,
+    IDS_FLAGS_ENABLE_SESSION_CRASHED_BUBBLE_DESCRIPTION,
+    kOsWin | kOsLinux,
+    SINGLE_VALUE_TYPE(switches::kEnableSessionCrashedBubble)
+  },
+  {
     "out-of-process-pdf",
     IDS_FLAGS_OUT_OF_PROCESS_PDF_NAME,
     IDS_FLAGS_OUT_OF_PROCESS_PDF_DESCRIPTION,