Revert "Stop using viewport values inside TimeGraph"

This reverts commit 6c92e87.

Create GetVisibleWidth in TimeGraph

Reinitialize CodedInputStream to work around the INT_MAX limitation

Bug: http://b/193764324

Fix file name conflict issue

And sequence number to file name if file already
exists.

Test: Manual - press x many times see that files with suffixes are
      created
Bug: http://b/191247811

Set pretty(demangled)_name when constructing FunctionInfo from Instru…

…mentedFunction

Bug: http://b/189222632
Test: run capture on OrbitTestLegacyApi

Fix crash when hovering on manually instrumented async scope

TimerInfo::kApiEvent don't have an "InstrumentedFunction" associated
with them so don't expect one.

Test: profile OrbitTest with manual instrumentation enabled, hover on
a profiling scope in one of the "async" tracks.

Clear viewport dirty flag before rendering

This allows the GlCanvas::Draw() method to update the viewport, which
will correctly mark it as dirty again and trigger a new rendering next
frame.

Capture() now waits for the Dialog to disappear

(cherry picked from commit 99c86ee18e768194af5bfb4d502cca9296e07f12)

Hide SourcePathsMapping button behing feature flag

Fix crash on unhooking function when capture_data is not available

Test: Start Orbit, load preset, unhook a function,
      make sure there is no crash.
Bug: http://b/179787649