Move libvpx from DEPS to src

third_party/libvpx/DEPS

Index: third_party/libvpx/DEPS
diff --git a/third_party/libvpx/DEPS b/third_party/libvpx/DEPS
new file mode 100644
index 0000000000000000000000000000000000000000..670ebbea397300a741c305b569bfa504ca7dad6c
--- /dev/null
+++ b/third_party/libvpx/DEPS
@@ -0,0 +1,12 @@
+include_rules = [
+  '+..',

[scottmg, 2015/05/29 23:00:52]

This seems weird, this generically allowing third_party? Can't you just use
third_party/whatever/ like other places do?

[Johann, 2015/05/29 23:08:06]

Some of our internal headers use relative paths:
https://chromium.googlesource.com/webm/libvpx/+/master/vpx/internal/vpx_codec...

And my understanding is that having this DEPS file in third_party/libvpx only
allows these within this component of third_party, not throughout third_party.

+  '+gtest',
+  '+libyuv',

[scottmg, 2015/05/29 23:00:52]

is this third_party/libyuv or third_party/libvpx/.../libyuv? (why do we have
both?)

[Johann, 2015/05/29 23:08:06]

this refers to third_party/libvpx/source/libvpx/third_party/libyuv:
https://chromium.googlesource.com/webm/libvpx/+/master/third_party/libyuv/

It's used by the upstream project for the example code show the use of scaling.
It's not actually built anywhere within src/third_party/libvpx/ (if the
presubmit was limited to files in .gypi/.gn files, it wouldn't show up)

+  '+test',
+  '+vp8',
+  '+vp9',
+  '+vpx',
+  '+vpx_mem',
+  '+vpx_ports',
+  '+vpx_scale',
+]