Android - Introduce "keyboard accessory" for Autofill suggestions.

The new UI is exposed behind a flag, --enable-autofill-keyboard-accessory-view. The intent is that there should be no behavior change when the flag is not passed, but eventually the flag will become the default and AutofillPopup[Bridge] and related code will be removed.

This maintains the same appearance for the list items, and matching the mocks (switching to white on blue, etc.) is a TODO. See go/wzhwq for goal state.

There are also TODOs surrounding behavior:
- we likely want to hide the keyboard accessory if the keyboard hide
- add animations
- somehow deal with very small amounts of available space (comes up in landscape mode)

BUG=428087
TBR=isherman@chromium.org

Review URL: https://codereview.chromium.org/1082183002

Cr-Commit-Position: refs/heads/master@{#327324}

1 files changed, 9 insertions, 0 deletions

diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 9aae179..9596ea5 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -2396,6 +2396,15 @@ const Experiment kExperiments[] = {
     kOsAndroid | kOsMac | kOsWin | kOsLinux | kOsCrOS,
     MULTI_VALUE_TYPE(kSupervisedUserSafeSitesChoices)
   },
+#if defined(OS_ANDROID)
+  {
+    "enable-autofill-keyboard-accessory-view",
+    IDS_FLAGS_AUTOFILL_ACCESSORY_VIEW_NAME,
+    IDS_FLAGS_AUTOFILL_ACCESSORY_VIEW_DESCRIPTION,
+    kOsAndroid,
+    SINGLE_VALUE_TYPE(autofill::switches::kEnableAccessorySuggestionView)
+  },
+#endif  // defined(OS_ANDROID)
   // NOTE: Adding new command-line switches requires adding corresponding
   // entries to enum "LoginCustomFlags" in histograms.xml. See note in
   // histograms.xml and don't forget to run AboutFlagsHistogramTest unit test.