Add query minimum of 3 for System Info Answer Cards in Launcher

Test: Added unit tests, works on DUT
Bug: b/308071854
Change-Id: I71648c62fe36c0086b39de95d17d7b246116d0e4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4983149
Commit-Queue: Lauren Commeignes <laurencom@chromium.org>
Reviewed-by: Dmitry Grebenyuk <dgrebenyuk@google.com>
Cr-Commit-Position: refs/heads/main@{#1216745}

chrome/browser/ash/app_list/search/system_info/system_info_card_provider.cc

@@ -56,6 +56,7 @@ using AnswerCardInfo = ::ash::SystemInfoAnswerCardData;
 
 constexpr double kMinimumRelevance = 0.0;
 constexpr double kRelevanceThreshold = 0.79;
+constexpr double kMinimumQueryLength = 3;
 
 double ConvertKBtoBytes(uint32_t amount) {
   return static_cast<double>(amount) * 1024;
@@ -97,6 +98,10 @@ SystemInfoCardProvider::~SystemInfoCardProvider() {
 }
 
 void SystemInfoCardProvider::Start(const std::u16string& query) {
+  if (query.length() < kMinimumQueryLength) {
+    return;
+  }
+
   double max_relevance = 0;
   SystemInfoKeywordInput* most_relevant_keyword_input;
   for (SystemInfoKeywordInput& keyword_input : keywords_) {

chrome/browser/ash/app_list/search/system_info/system_info_card_provider_unittest.cc

@@ -396,6 +396,33 @@ TEST_F(SystemInfoCardProviderTest, Version) {
   EXPECT_TRUE(details.GetTextTags().empty());
 }
 
+TEST_F(SystemInfoCardProviderTest, PreventTriggeringOfTooShortQueries) {
+  auto timer = std::make_unique<base::MockRepeatingTimer>();
+  provider_->SetCpuUsageTimerForTesting(std::move(timer));
+
+  int temp_1 = 40;
+  int temp_2 = 50;
+  int temp_3 = 15;
+  uint32_t core_1_speed = 4000000;
+  uint32_t core_2_speed = 2000000;
+  CpuUsageData core_1(1000, 1000, 1000);
+  CpuUsageData core_2(2000, 2000, 2000);
+
+  SetCrosHealthdCpuResponse({core_1, core_2}, {temp_1, temp_2, temp_3},
+                            {core_1_speed, core_2_speed});
+  StartSearch(u"cp");
+  Wait();
+  ASSERT_TRUE(results().empty());
+
+  StartSearch(u"c");
+  Wait();
+  ASSERT_TRUE(results().empty());
+
+  StartSearch(u"cpu");
+  Wait();
+  ASSERT_FALSE(results().empty());
+}
+
 TEST_F(SystemInfoCardProviderTest, Cpu) {
   // Setup Timer
   auto timer = std::make_unique<base::MockRepeatingTimer>();