[Merge to 2883] Revert of Fix RenderWidgetHostViewMac compliance with NSTextInputClient.

[Merge to 2883] Revert of Fix RenderWidgetHostViewMac compliance with NSTextInputClient.

> Reason for revert:
> Breaks some IME [hold down a vowel, English input language] without fully fixing IME issues on macOS Sierra.
>
> https://bugs.chromium.org/p/chromium/issues/detail?id=664554#c5
>
> Original issue's description:
> > Fix memory leaks in macOS Sierra for IME.
> >
> > The documentation for NSTextInputClient states that:
> >   -selectedRange should return { NSNotFound, 0 } if there is no selection range.
> >   -attributedSubstringForProposedRange:actualRange: must be able to handle
> >   invalid ranges.
> >
> > The previous implementations in RenderWidgetHostViewCocoa failed to do either,
> > which results in catastrophic memory leaks on macOS Sierra during IME. In an
> > ASAN build, AppKit attempts to allocate ~2^64 bytes of memory.
> >
> > BUG=654695
> >
> > Committed: https://crrev.com/7d85f23cb0235db06b0b6c2de1dc29ae5eaeb8f5
> > Cr-Commit-Position: refs/heads/master@{#430116}
>
> TBR=avi@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=654695
>
> Review-Url: https://codereview.chromium.org/2497073002
> Cr-Commit-Position: refs/heads/master@{#431713}
> (cherry picked from commit f31b9cbfe43d85c9b631c1da8a01997b9ef24e9c)

Committed: https://chromium.googlesource.com/chromium/src/+/375a0e0246639ae6f9ed2f6561d657187f9431c1

[erikchen, 2016-11-12 01:03:11]

Description was changed from

==========
[Merge to 2883] Revert of Fix RenderWidgetHostViewMac compliance with
NSTextInputClient.

> Reason for revert:
> Breaks some IME [hold down a vowel, English input language] without fully
fixing IME issues on macOS Sierra.
>
> https://bugs.chromium.org/p/chromium/issues/detail?id=664554#c5
>
> Original issue's description:
> > Fix memory leaks in macOS Sierra for IME.
> >
> > The documentation for NSTextInputClient states that:
> >   -selectedRange should return { NSNotFound, 0 } if there is no selection
range.
> >   -attributedSubstringForProposedRange:actualRange: must be able to handle
> >   invalid ranges.
> >
> > The previous implementations in RenderWidgetHostViewCocoa failed to do
either,
> > which results in catastrophic memory leaks on macOS Sierra during IME. In an
> > ASAN build, AppKit attempts to allocate ~2^64 bytes of memory.
> >
> > BUG=654695
> >
> > Committed: https://crrev.com/7d85f23cb0235db06b0b6c2de1dc29ae5eaeb8f5
> > Cr-Commit-Position: refs/heads/master@{#430116}
>
> TBR=avi@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=654695
>
> Review-Url: https://codereview.chromium.org/2497073002
> Cr-Commit-Position: refs/heads/master@{#431713}
> (cherry picked from commit f31b9cbfe43d85c9b631c1da8a01997b9ef24e9c)
==========

to

==========
[Merge to 2883] Revert of Fix RenderWidgetHostViewMac compliance with
NSTextInputClient.

> Reason for revert:
> Breaks some IME [hold down a vowel, English input language] without fully
fixing IME issues on macOS Sierra.
>
> https://bugs.chromium.org/p/chromium/issues/detail?id=664554#c5
>
> Original issue's description:
> > Fix memory leaks in macOS Sierra for IME.
> >
> > The documentation for NSTextInputClient states that:
> >   -selectedRange should return { NSNotFound, 0 } if there is no selection
range.
> >   -attributedSubstringForProposedRange:actualRange: must be able to handle
> >   invalid ranges.
> >
> > The previous implementations in RenderWidgetHostViewCocoa failed to do
either,
> > which results in catastrophic memory leaks on macOS Sierra during IME. In an
> > ASAN build, AppKit attempts to allocate ~2^64 bytes of memory.
> >
> > BUG=654695
> >
> > Committed: https://crrev.com/7d85f23cb0235db06b0b6c2de1dc29ae5eaeb8f5
> > Cr-Commit-Position: refs/heads/master@{#430116}
>
> TBR=avi@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=654695
>
> Review-Url: https://codereview.chromium.org/2497073002
> Cr-Commit-Position: refs/heads/master@{#431713}
> (cherry picked from commit f31b9cbfe43d85c9b631c1da8a01997b9ef24e9c)

Committed:
https://chromium.googlesource.com/chromium/src/+/375a0e0246639ae6f9ed2f6561d6...
==========

[erikchen, 2016-11-12 01:03:13]

Committed patchset #1 (id:1) manually as
375a0e0246639ae6f9ed2f6561d657187f9431c1.