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This CL moves the bulk of the SkyView code out of the |framework| directory because the |framework| directory was redundant in Dart package import declarations. TBR=ianh@google.com Review URL: https://codereview.chromium.org/1177383006.
SKY SDK
Sky and Sky's SDK are designed as layered frameworks, where each layer depends on the ones below it but could be replaced wholesale.
The bottom-most layer is the Sky Platform, which is exposed to Dart
code as the dart:sky package.
Above this are the files in the painting/ directory, which provide APIs related to drawing graphics.
Layout primitives are provided in the next layer, found in the
rendering/ directory. They use dart:sky and the
APIs exposed in painting/ to provide a retained-mode layout and
rendering model for applications or documents.
Widgets are provided by the files in the widgets/ directory, using a reactive framework.
Text input widgets are layered on this mechanism and can be found in the editing2/ directory.