CrOS OOBE - Fix Assistant message about battery

The Assistant flow in OOBE mentions that it will only listen when
the device is connected to a power source in order to save battery
when no DSP is available. This prevents this message from showing
up on Chromebases, Chromebits and Chromeboxes.

Fixed: 1109363
Bug: 1109363
Change-Id: I188a06d8e7c42064a6daab8f27a2e963930ee1fe
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2416696
Commit-Queue: Renato Silva <rrsilva@google.com>
Commit-Queue: Roman Sorokin [CET] <rsorokin@chromium.org>
Reviewed-by: Roman Sorokin [CET] <rsorokin@chromium.org>
Auto-Submit: Renato Silva <rrsilva@google.com>
Cr-Commit-Position: refs/heads/master@{#808911}

chrome/browser/resources/chromeos/assistant_optin/assistant_voice_match.js

@@ -185,7 +185,8 @@ Polymer({
     this.$['already-setup-lottie'].setPlay(true);
     Polymer.RenderStatus.afterNextRender(
         this, () => this.$['agree-button'].focus());
-    if (loadTimeData.getBoolean('hotwordDspAvailable')) {
+    if (loadTimeData.getBoolean('hotwordDspAvailable') ||
+        loadTimeData.getBoolean('deviceHasNoBattery')) {
       this.$['no-dsp-message'].hidden = true;
     }
   },

chrome/browser/ui/webui/chromeos/login/assistant_optin_flow_screen_handler.cc

@@ -17,6 +17,7 @@
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/webui/chromeos/assistant_optin/assistant_optin_utils.h"
 #include "chrome/grit/generated_resources.h"
+#include "chromeos/dbus/power/power_manager_client.h"
 #include "chromeos/services/assistant/public/cpp/assistant_prefs.h"
 #include "chromeos/services/assistant/public/cpp/assistant_service.h"
 #include "chromeos/services/assistant/public/cpp/features.h"
@@ -147,6 +148,7 @@ void AssistantOptInFlowScreenHandler::RegisterMessages() {
 void AssistantOptInFlowScreenHandler::GetAdditionalParameters(
     base::DictionaryValue* dict) {
   dict->SetBoolean("hotwordDspAvailable", chromeos::IsHotwordDspAvailable());
+  dict->SetBoolean("deviceHasNoBattery", !DeviceHasBattery());
   dict->SetBoolean("voiceMatchDisabled",
                    chromeos::assistant::features::IsVoiceMatchDisabled());
   BaseScreenHandler::GetAdditionalParameters(dict);
@@ -603,4 +605,17 @@ void AssistantOptInFlowScreenHandler::HandleFlowInitialized(
     SendGetSettingsRequest();
 }
 
+bool AssistantOptInFlowScreenHandler::DeviceHasBattery() {
+  // Assume that the device has a battery if we can't determine otherwise.
+  if (!chromeos::PowerManagerClient::Get())
+    return true;
+
+  auto status = PowerManagerClient::Get()->GetLastStatus();
+  if (!status.has_value() || !status->has_battery_state())
+    return true;
+
+  return status->battery_state() !=
+         power_manager::PowerSupplyProperties_BatteryState_NOT_PRESENT;
+}
+
 }  // namespace chromeos

chrome/browser/ui/webui/chromeos/login/assistant_optin_flow_screen_handler.h

@@ -128,6 +128,9 @@ class AssistantOptInFlowScreenHandler
   void HandleFlowFinished();
   void HandleFlowInitialized(const int flow_type);
 
+  // Power related
+  bool DeviceHasBattery();
+
   AssistantOptInFlowScreen* screen_ = nullptr;
 
   base::OnceClosure on_initialized_;