Finalize pruning of services/device peripheral modules

[johnxwork]

This change completes the pruning of unused peripheral hardware modules (WebUSB, Web Bluetooth, WebHID, Web Serial, and Web NFC) in content/browser and services/device. Gated StoragePartition maps and browser binders under !BUILDFLAG(IS_COBALT).

This additional pruning achieves the following binary size savings on Android:

• libchrobalt.so: -237,568 bytes (-232.0 KB)
• Cobalt.apk: -261,708 bytes (-255.5 KB)

[github-actions]

🤖 Gemini Suggested Commit Message

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cobalt: Finalize pruning of peripheral modules

Complete the pruning of unused peripheral hardware modules, including
WebUSB, Web Bluetooth, WebHID, Web Serial, and Web NFC, from the
content and services layers. This change gates browser interface
binders, StoragePartition maps, and device service dependencies
behind the IS_COBALT build flag.

The removal of these modules provides significant binary size
reductions, specifically saving approximately 232 KB in the Android
shared library and 255 KB in the Cobalt APK.

Bug: 10778

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[gemini-code-assist]

Code Review

This pull request introduces build-time exclusions and conditional preprocessor blocks under the is_cobalt flag to disable several web APIs and services (such as Bluetooth, USB, HID, NFC, and Serial) on the Cobalt platform. The review feedback highlights a critical issue in services/device/BUILD.gn where the accidental removal of the IS_SERIAL_ENABLED_PLATFORM definition disables the Serial service globally across all platforms. Additionally, the feedback advises replacing deprecated streaming usage of NOTREACHED() with the standard non-streaming NOTREACHED(); macro to prevent compilation failures in newer milestones.

[gemini-code-assist]

Removing defines = [ "IS_SERIAL_ENABLED_PLATFORM" ] will prevent IS_SERIAL_ENABLED_PLATFORM from being defined during compilation. This will disable the Serial service on all platforms (including non-Cobalt platforms like Windows, Mac, Linux, and Android) because the C++ code (e.g., in device_service.cc) relies on this macro to include and bind the serial port manager. Please restore the defines statement inside the is_serial_enabled_platform block.

Suggested change

	if (is_serial_enabled_platform) {
	deps += [ "//services/device/serial" ]
	defines = [ "IS_SERIAL_ENABLED_PLATFORM" ]
	}
	if (is_serial_enabled_platform) {
	deps += [ "//services/device/serial" ]
	defines = [ "IS_SERIAL_ENABLED_PLATFORM" ]
	}

[gemini-code-assist]

In modern Chromium (and thus Cobalt), NOTREACHED() has been updated to be a non-streaming macro (or behaves as [[noreturn]] depending on the build configuration). Using the operator<< stream syntax with NOTREACHED() is deprecated and will cause compilation errors in newer milestones. Please use NOTREACHED(); without any stream arguments.

Suggested change

	NOTREACHED() << "WebUSB is not supported on Cobalt.";
	NOTREACHED();

[gemini-code-assist]

In modern Chromium (and thus Cobalt), NOTREACHED() has been updated to be a non-streaming macro (or behaves as [[noreturn]] depending on the build configuration). Using the operator<< stream syntax with NOTREACHED() is deprecated and will cause compilation errors in newer milestones. Please use NOTREACHED(); without any stream arguments.

Suggested change

	NOTREACHED() << "WebUSB is not supported on Cobalt.";
	NOTREACHED();