ios build break on gyp/ninja build

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What steps will reproduce the problem?
1.

GYP_DEFINES="OS=ios target_arch=armv7" GYP_CROSSCOMPILE=1  
GYP_GENERATOR_FLAGS="output_dir=out_ios" ./build/gyp_chromium -f ninja 
--depth=. libyuv_test.gyp
ninja -j8 -C out_ios/Debug-iphoneos
ninja -j8 -C out_ios/Release-iphoneos

What is the expected output? What do you see instead?

gyp: third_party/class-dump/class-dump.gyp not found (cwd: 
/Users/fbarchard/libyuv2/libyuv)
ninja: Entering directory `out_ios/Debug-iphoneos'

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Original issue reported on code.google.com by fbarch...@google.com on 18 Jun 2015 at 6:21

• Blocking: #458

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Original comment by fbarch...@google.com on 24 Jun 2015 at 2:21

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my roll forward on chromium to attempt a fix on this broke bots on android, so 
I'll use this bug to track mobile builds.

Original comment by fbarch...@google.com on 26 Jun 2015 at 9:27

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Original comment by fbarch...@google.com on 26 Jun 2015 at 9:43

• Now blocking: #458

[GoogleCodeExporter]

I ran into this when rolling https://codereview.webrtc.org/1145343009/
I think you need to imitate WebRTC's changes to roll past that chromium 
revision.

Assigning to you since I'm on a leave.

Original comment by kjellan...@google.com on 28 Jun 2015 at 7:05