[web] support for Image.file

[uuttff8]

Why flutter_web don't support Image.file() widget?

Steps to Reproduce

1. use flutter_web library
2. use Image.file() widget

[✓] Flutter (Channel master, v1.7.4-pre.88, on Mac OS X 10.14.5 18F132, locale en-RU)
    • Flutter version 1.7.4-pre.88 at /Users/uuttff8/flutter
    • Framework revision 3b42341aac (3 days ago), 2019-06-13 09:52:09 -0700
    • Engine revision 209250da1b
    • Dart version 2.3.3 (build 2.3.3-dev.0.0 3166bbf24b)

 
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.0)
    • Android SDK at /Users/uuttff8/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-29, build-tools 29.0.0
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1343-b01)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 11.0)
    • Xcode at /Applications/Xcode-beta.app/Contents/Developer
    • Xcode 11.0, Build version 11M336w
    • CocoaPods version 1.7.1

[✓] iOS tools - develop for iOS devices
    • ios-deploy 1.9.4

[✓] Android Studio (version 3.4)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 36.1.1
    • Dart plugin version 183.6270
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1343-b01)

[✓] VS Code (version 1.35.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.1.0

[✓] Connected device (1 available)
    • iPhone Xʀ • 7350F3E3-8C67-4C28-AEED-83765BF34F78 • ios • com.apple.CoreSimulator.SimRuntime.iOS-13-0 (simulator)

• No issues found!

[jonahwilliams]

Applications running in a web browser have no access to the underlying filesystem. This is not something that we're planning or able to work around.

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.