assistant: Add flags for Dsp hotword

Bug: b/77916222
Test: locally build and run on eve
Change-Id: If98c7ea10e1778626563587f58c0773351e8e485
Reviewed-on: https://chromium-review.googlesource.com/c/1341081Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Reviewed-by: Yue Li <updowndota@chromium.org>
Commit-Queue: Xiaohui Chen <xiaohuic@chromium.org>
Cr-Commit-Position: refs/heads/master@{#610927}

chrome/browser/about_flags.cc

@@ -4404,6 +4404,10 @@ const FeatureEntry kFeatureEntries[] = {
      flag_descriptions::kEnableAssistantVoiceMatchName,
      flag_descriptions::kEnableAssistantVoiceMatchDescription, kOsCrOS,
      FEATURE_VALUE_TYPE(chromeos::assistant::features::kAssistantVoiceMatch)},
+
+    {"enable-assistant-dsp", flag_descriptions::kEnableGoogleAssistantDspName,
+     flag_descriptions::kEnableGoogleAssistantDspDescription, kOsCrOS,
+     FEATURE_VALUE_TYPE(chromeos::assistant::features::kEnableDspHotword)},
 #endif  // defined(OS_CHROMEOS)
 
     {"enable-blink-heap-unified-garbage-collection",

chrome/browser/flag-metadata.json

@@ -766,9 +766,14 @@
     // "owners": [ "your-team" ],
     "expiry_milestone": 76
   },
+  {
+    "name": "enable-assistant-dsp",
+    "owners": [ "croissant-eng" ],
+    "expiry_milestone": 76
+  },
   {
     "name": "enable-assistant-voice-match",
-    // "owners": [ "your-team" ],
+    "owners": [ "croissant-eng" ],
     "expiry_milestone": 76
   },
   {
@@ -1403,7 +1408,7 @@
   },
   {
     "name": "enable-native-google-assistant",
-    // "owners": [ "your-team" ],
+    "owners": [ "croissant-eng" ],
     "expiry_milestone": 76
   },
   {

chrome/browser/flag_descriptions.cc

@@ -3335,6 +3335,13 @@ const char kEnableGoogleAssistantDescription[] =
     "Enable an experimental Assistant implementation that will work on all "
     "Chromebooks.";
 
+const char kEnableGoogleAssistantDspName[] =
+    "Enable Google Assistant with hardware-based hotword";
+const char kEnableGoogleAssistantDspDescription[] =
+    "Enable an experimental feature that uses hardware-based hotword detection "
+    "for Assistant. Only a limited number of devices have this type of "
+    "hardware support.";
+
 const char kEnableHomeLauncherName[] = "Enable home launcher";
 const char kEnableHomeLauncherDescription[] =
     "Enable home launcher in tablet mode.";

chrome/browser/flag_descriptions.h

@@ -2009,6 +2009,9 @@ extern const char kEnableFullscreenHandwritingVirtualKeyboardDescription[];
 extern const char kEnableGoogleAssistantName[];
 extern const char kEnableGoogleAssistantDescription[];
 
+extern const char kEnableGoogleAssistantDspName[];
+extern const char kEnableGoogleAssistantDspDescription[];
+
 extern const char kEnableHomeLauncherName[];
 extern const char kEnableHomeLauncherDescription[];
 

tools/metrics/histograms/enums.xml

@@ -29666,6 +29666,7 @@ from previous Chrome versions.
   <int value="-1269084216" label="ash-md"/>
   <int value="-1268836676" label="disable-out-of-process-pdf"/>
   <int value="-1267958145" label="disable-pdf-material-ui"/>
+  <int value="-1262730949" label="EnableDspHotword:enabled"/>
   <int value="-1262152606" label="disable-lock-screen-apps"/>
   <int value="-1261972671" label="OmniboxDocumentProvider:disabled"/>
   <int value="-1261263046"
@@ -30841,6 +30842,7 @@ from previous Chrome versions.
   <int value="963457392" label="ChromeHomeModernLayout:disabled"/>
   <int value="963671232" label="DrawOcclusion:disabled"/>
   <int value="966415988" label="SyncPseudoUSSPasswords:enabled"/>
+  <int value="969340095" label="EnableDspHotword:disabled"/>
   <int value="972228058" label="SyncUSSSessions:disabled"/>
   <int value="973601997" label="SafeBrowsingUseLocalBlacklistsV2:disabled"/>
   <int value="975104092" label="show-taps"/>