Speed up interop patch file creation

Speed up interop patch file creation.

Made a number of optimizations to reduce load time from 8 secs to 1 sec.  The changes involved:

- No longer dynamically generate patch files on startup for dart:* libraries (created from WebKits IDL e.g., html, svg, web_audio, web_gl, indexed_db, web_sql).  Instead create a cache of patch files.

- Comparison of @JS refelctedType not by library and symbol name comparison.

- In addition, a VM mirror change see CL https://codereview.chromium.org/1834673003/ gives us the remaining speedup.

This cache of interop patch files, for Dartium only, requires a manual re-gen after go.sh run is:

> cd tools/dom/scripts
> run go.sh

The steps after (for Dartium) are:

1.  build Dartium
2.  cd tools/dartium
3.  run generate_patches.sh
4.  build Dartium

R=jacobr@google.com, alanknight@google.com

Committed: https://github.com/dart-lang/sdk/commit/10e70db01c98de3f426f07f000209d3f14328065

[terry, 2016-03-27 09:20:33]

Description was changed from

==========
Speed up interop patch file creation

R=jacobr@google.com,alanknight@google.com
==========

to

==========
Speed up interop patch file creation.

Made a number of optimizations to reduce load time from 8 secs to 1 sec.  The
changes involved:

- No longer dynamically generate patch files on startup for dart:* libraries
(created from WebKits IDL e.g., html, svg, web_audio, web_gl, indexed_db,
web_sql).  Instead create a cache of patch files.

- Comparison of @JS refelctedType not by library and symbol name comparison.

- In addition, a VM mirror change see CL
https://codereview.chromium.org/1834673003/ gives us the remaining speedup.

This cache of interop patch files, for Dartium only, requires a manual re-gen
after go.sh run is:

> cd tools/dom/scripts
> run go.sh

The steps after (for Dartium) are:

1.  build Dartium
2.  cd tools/dartium
3.  run generate_patches.sh
4.  build Dartium


R=jacobr@google.com,alanknight@google.com
==========

[Jacob, 2016-03-28 14:23:58]

lgtm

https://codereview.chromium.org/1833373002/diff/60001/sdk/lib/js/dartium/js_d...
File sdk/lib/js/dartium/js_dartium.dart (right):

https://codereview.chromium.org/1833373002/diff/60001/sdk/lib/js/dartium/js_d...
sdk/lib/js/dartium/js_dartium.dart:286: String createCachedPatchesFile() {
can you keep this method out of dart:js which is a public library?
At least this method needs to prefixed with
@Deprecated

[terry, 2016-03-28 14:45:32]

Incorporated your changes.

Will create another CL to change the dart: patch files generation to use Python
instead of Dart - removing the patches being creating using Dartium.

https://codereview.chromium.org/1833373002/diff/60001/sdk/lib/js/dartium/js_d...
File sdk/lib/js/dartium/js_dartium.dart (right):

https://codereview.chromium.org/1833373002/diff/60001/sdk/lib/js/dartium/js_d...
sdk/lib/js/dartium/js_dartium.dart:286: String createCachedPatchesFile() {
On 2016/03/28 14:23:58, Jacob wrote:
> can you keep this method out of dart:js which is a public library?
> At least this method needs to prefixed with
> @Deprecated

Added @Deprecated("Internal Use Only")
Done.

[terry, 2016-03-28 15:20:20]

Description was changed from

==========
Speed up interop patch file creation.

Made a number of optimizations to reduce load time from 8 secs to 1 sec.  The
changes involved:

- No longer dynamically generate patch files on startup for dart:* libraries
(created from WebKits IDL e.g., html, svg, web_audio, web_gl, indexed_db,
web_sql).  Instead create a cache of patch files.

- Comparison of @JS refelctedType not by library and symbol name comparison.

- In addition, a VM mirror change see CL
https://codereview.chromium.org/1834673003/ gives us the remaining speedup.

This cache of interop patch files, for Dartium only, requires a manual re-gen
after go.sh run is:

> cd tools/dom/scripts
> run go.sh

The steps after (for Dartium) are:

1.  build Dartium
2.  cd tools/dartium
3.  run generate_patches.sh
4.  build Dartium


R=jacobr@google.com,alanknight@google.com
==========

to

==========
Speed up interop patch file creation.

Made a number of optimizations to reduce load time from 8 secs to 1 sec.  The
changes involved:

- No longer dynamically generate patch files on startup for dart:* libraries
(created from WebKits IDL e.g., html, svg, web_audio, web_gl, indexed_db,
web_sql).  Instead create a cache of patch files.

- Comparison of @JS refelctedType not by library and symbol name comparison.

- In addition, a VM mirror change see CL
https://codereview.chromium.org/1834673003/ gives us the remaining speedup.

This cache of interop patch files, for Dartium only, requires a manual re-gen
after go.sh run is:

> cd tools/dom/scripts
> run go.sh

The steps after (for Dartium) are:

1.  build Dartium
2.  cd tools/dartium
3.  run generate_patches.sh
4.  build Dartium

R=jacobr@google.com, alanknight@google.com

Committed:
https://github.com/dart-lang/sdk/commit/10e70db01c98de3f426f07f000209d3f14328065
==========

[terry, 2016-03-28 15:20:21]

Committed patchset #6 (id:100001) manually as
10e70db01c98de3f426f07f000209d3f14328065 (presubmit successful).