Omnibox Watcher: Don't Flag Incidents that are Paste+Enter

The code currently excludes paste-and-go operations.  It should probably
also exclude paste+enter operations; these are effectively equivalent.

TODO before submitting: test interactively

BUG=
TBR=bauerb@chromium.org

Review URL: https://codereview.chromium.org/795343002

Cr-Commit-Position: refs/heads/master@{#308233}

chrome/browser/android/omnibox/autocomplete_controller_android.cc

@@ -223,6 +223,7 @@ void AutocompleteControllerAndroid::OnSuggestionSelected(
       true,
       selected_index,
       false,
+      false, /* don't know */
       SessionTabHelper::IdForTab(web_contents),
       current_page_classification,
       base::TimeDelta::FromMilliseconds(elapsed_time_since_first_modified),

chrome/browser/omnibox/omnibox_log.cc

@@ -11,6 +11,7 @@ OmniboxLog::OmniboxLog(
     bool is_popup_open,
     size_t selected_index,
     bool is_paste_and_go,
+    bool last_action_was_paste,
     SessionID::id_type tab_id,
     metrics::OmniboxEventProto::PageClassification current_page_classification,
     base::TimeDelta elapsed_time_since_user_first_modified_omnibox,
@@ -23,6 +24,7 @@ OmniboxLog::OmniboxLog(
       is_popup_open(is_popup_open),
       selected_index(selected_index),
       is_paste_and_go(is_paste_and_go),
+      last_action_was_paste(last_action_was_paste),
       tab_id(tab_id),
       current_page_classification(current_page_classification),
       elapsed_time_since_user_first_modified_omnibox(

chrome/browser/omnibox/omnibox_log.h

@@ -26,6 +26,7 @@ struct OmniboxLog {
       bool is_popup_open,
       size_t selected_index,
       bool is_paste_and_go,
+      bool last_action_was_paste,
       SessionID::id_type tab_id,
       metrics::OmniboxEventProto::PageClassification
           current_page_classification,
@@ -56,6 +57,10 @@ struct OmniboxLog {
   // (The codebase refers to both these types as paste-and-go.)
   bool is_paste_and_go;
 
+  // True if the user's last action was a paste or if (somehow) the user is
+  // still in the act of pasting.
+  bool last_action_was_paste;
+
   // ID of the tab the selected autocomplete suggestion was opened in.
   // Set to -1 if we haven't yet determined the destination tab.
   SessionID::id_type tab_id;

chrome/browser/safe_browsing/incident_reporting/omnibox_watcher.cc

@@ -37,8 +37,8 @@ void OmniboxWatcher::Observe(int type,
   // No normal person can type URLs that fast!  Navigating to a URL as a
   // result of such typing is suspicious.
   // TODO(mpearson): Add support for suspicious queries.
-  if (!log->is_paste_and_go && log->is_popup_open &&
-      (log->text.length() > 200) &&
+  if (!log->is_paste_and_go && !log->last_action_was_paste &&
+      log->is_popup_open && (log->text.length() > 200) &&
       (log->elapsed_time_since_user_first_modified_omnibox <
        base::TimeDelta::FromSeconds(1)) &&
       !AutocompleteMatch::IsSearchType(selected_suggestion.type)) {

chrome/browser/ui/omnibox/omnibox_edit_model.cc

@@ -755,7 +755,8 @@ void OmniboxEditModel::OpenMatch(AutocompleteMatch match,
       input_.type(),
       popup_model()->IsOpen(),
       (!popup_model()->IsOpen() || !pasted_text.empty()) ? 0 : index,
-      !pasted_text.empty(),
+      !pasted_text.empty(),  // is_paste_and_go
+      paste_state_ != NONE,  // last_action_was_paste
       -1,  // don't yet know tab ID; set later if appropriate
       ClassifyPage(),
       elapsed_time_since_user_first_modified_omnibox,