[vr] Fix typo in constant.

Fixes a mistyped number.

Bug: None
Change-Id: I770e954de312774a05e96ceb7735895d8a1df9c6
Reviewed-on: https://chromium-review.googlesource.com/830889Reviewed-by: Yash Malik <ymalik@chromium.org>
Commit-Queue: Ian Vollick <vollick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524492}

chrome/browser/android/vr_shell/autocomplete_controller.cc

@@ -19,7 +19,7 @@ namespace vr_shell {
 
 namespace {
 constexpr size_t kMaxNumberOfSuggestions = 4;
-constexpr int kSuggestionThrottlingDelayMs = 300;
+constexpr int kSuggestionThrottlingDelayMs = 150;
 }  // namespace
 
 AutocompleteController::AutocompleteController(vr::BrowserUiInterface* ui)