Roll src/third_party/perfetto 448444596bbc..687249cc9ed7 (3 commits)

https://android.googlesource.com/platform/external/perfetto.git/+log/448444596bbc..687249cc9ed7

git log 448444596bbc..687249cc9ed7 --date=short --no-merges --format='%ad %ae %s'
2019-10-03 primiano@google.com GN: fix cross-compilation support
2019-10-03 fmayer@google.com Merge "Alow to set BufferExhaustedPolicy in client API."
2019-10-03 taylori@google.com Merge "perfetto-ui: Go to CPU sched slice"

Created with:
  gclient setdep -r src/third_party/perfetto@687249cc9ed7

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/perfetto-chromium-autoroll
Please CC perfetto-bugs@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

TBR=perfetto-bugs@google.com

Bug: chromium:141319350
Change-Id: I876bd09caa1f46e7f622d4fdcaa183ec232c7036
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1837259Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#702493}

DEPS

@@ -1269,7 +1269,7 @@ deps = {
   },
 
   'src/third_party/perfetto':
-    Var('android_git') + '/platform/external/perfetto.git' + '@' + '448444596bbcf64d3bf1783beb9724820165147a',
+    Var('android_git') + '/platform/external/perfetto.git' + '@' + '687249cc9ed739edad8f673d2cbef6eabebdd9f5',
 
   'src/third_party/perl': {
       'url': Var('chromium_git') + '/chromium/deps/perl.git' + '@' + '6f3e5028eb65d0b4c5fdd792106ac4c84eee1eb3',