Hixie pointed out that what I had before was resetting all of the MediaQuery values, not just textScaleFactor. This should fix that.

Syncing source files is not needed when host sends kernel file to the device.

This aids in running the tests internally in Google
since the libraries upon which tests depend and the
test files themselves are defined separately.

Merge confliuct between #12605 and #12613

* Oct 12 10:12am

* implicit_semantics_test.dart passes

* refactoring

* works in nice

* minor rename

* more doc comments

* to be explicit check better

* fix test

* ++

* ++

* semantics_9_test (BlockSemantics) and implicit_semantics_test are passing

* doc updates

* tiny refactor

* fix static errors in tests

* fix gesture detector

* ++

* ++

* geometry

* ++

* remove noGeometry

* revert test

* +

* all tests but scrolling/clipping pass

* clipping works

* scrolling halfway

* sliver tests pass

* ALL TESTS PASS

* SemanticsNode changed

* docs and tiny fixes

* card test

* more doc comments

* remove missed print

* more tests

* make test pass on Linux

* remove changes to intellij proj file

* review comments

* Make Tab take a widget as child

This way you can override the semantics information of a Tab (see test).

Fixes https://github.com/flutter/flutter/issues/12432

* more tests

* review comments

* review comment

* doc nits

* style fix

On iOS 11.0.x ideviceinfo fails with the following message
ERROR: Could not connect to lockdownd, error code -3

This workaround should also work for #12330

libtxt's implementation of Paragraph.getBoxesForRange returns the full line
height for all characters in a line.  Blink had been returning a tighter
enclosing rectangle for each individual character.

This patch also makes it possible to create FLX files with no extension.
Previously, the zip tool would add the ".zip" extension if the output file
lacked an extension.

libtxt has different policies than Blink for trimming whitespace.  This change
will make the test results consistent in both text renderers.

gen_snapshot loads all packages from single app kernel file.

This still is very limited in what it can lerp, but it sets the stage for arbitrary lerps later.

If the flex is empty, there's no space in which to draw the overflow indicator,
so we shouldn't bother trying to draw it.

Fixes #12532

* add CupertinoIcons

* Use new font name convention

* review

This is follow-up to be1467e0.

This lets us preview widgets in the gallery using small, normal, large, and HUGE text.

Added selections to the main drawer for these options. Defaults to "normal", obviously.

Previously chosen pattern was generated in the output not quite at the end of the hot reload process.

* Restructure hot mode test so it runs interactively.

This allows to add a benchmark for hot reload after actual source code change.

* Add curly braces, refactory copyRecursive

This modifies the MaterialButton to expand vertically to fit the size of the contained child, no matter what the child widget is. It tries to be as close as possible to the minHeight constraint.

Also updated some doc comments to have headers (extra blank line after first sentence), and to wrap at 80 cols.

Addresses #12311

* Keep incremental compiler state through full restart.

* Add todo

* Add todo