Revert "[Mac] Fix form control rendering on 10.14 Mojave."

This reverts commit e7652b9e.

Reason for revert: SandboxV2Test.SandboxProfileTest is failing on mac

The test has been failing since this CL landed. There doesn't seem
to be any other culprit. A lot of tests have been failing on mac
for a while, so apologies in advance if this revert is incorrect.

https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Mac10.10%20Tests/33158

[ RUN      ] SandboxV2Test.SandboxProfileTest
[29390:779:0615/235812.468905:11042865975282:WARNING:test_suite.cc(240)] Test launcher output path /var/folders/9x/6c6sv3cj4j53wzpzthbp4ksm0000gm/T/.org.chromium.Chromium.u2ydbY/test_results.xml exists. Not adding test launcher result printer.
[29390:779:0615/235812.562300:11042959366455:FATAL:sandbox_mac_v2_unittest.mm(113)] Check failed: result. line 123: unbound variable: prefix
0   content_unittests                   0x000000010a96c29c base::debug::StackTrace::StackTrace(unsigned long) + 28
1   content_unittests                   0x000000010a8f3171 logging::LogMessage::~LogMessage() + 225
2   content_unittests                   0x0000000108751c4b content::SandboxProfileProcess() + 3499
3   content_unittests                   0x000000010a128248 base::TestSuite::Run() + 104
4   content_unittests                   0x000000010a13ba1c base::(anonymous namespace)::LaunchUnitTestsInternal(base::OnceCallback<int ()>, unsigned long, int, bool, base::OnceCallback<void ()>) + 284
5   content_unittests                   0x000000010a13b8d0 base::LaunchUnitTests(int, char**, base::OnceCallback<int ()>) + 160
6   content_unittests                   0x000000010874fbf6 main + 198
7   libdyld.dylib                       0x00007fff993895c9 start + 1
../../content/renderer/sandbox_mac_v2_unittest.mm:182: Failure
Expected equality of these values:
  exit_code
    Which is: 1
  0
Stack trace:
0   content_unittests                   0x000000010e5750cb testing::internal::UnitTestImpl::CurrentOsStackTraceExceptTop(int) + 91
1   content_unittests                   0x000000010e574a89 testing::internal::AssertHelper::operator=(testing::Message const&) const + 89
2   content_unittests                   0x000000010df21a94 content::SandboxV2Test_SandboxProfileTest_Test::TestBody() + 804
[  FAILED  ] SandboxV2Test.SandboxProfileTest (273 ms)


Original change's description:
> [Mac] Fix form control rendering on 10.14 Mojave.
> 
> The renderers need to talk to the CVMS server (OpenCL compiler), which
> then outputs codesigned blobs that can be loaded in to the process. This
> is required for drawing the form controls.
> 
> In addition, another Metal bundle location (in /Library) is permitted.
> 
> Bug: 850021, 847518
> Change-Id: I67106972baf5fc55fccd8f7deff3f47cbea076b5
> Reviewed-on: https://chromium-review.googlesource.com/1103127
> Reviewed-by: Greg Kerr <kerrnel@chromium.org>
> Commit-Queue: Robert Sesek <rsesek@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#567877}

TBR=kerrnel@chromium.org,rsesek@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 850021, 847518
Change-Id: Ife268e2d49abc98ad3708545223667e0fb12190c
Reviewed-on: https://chromium-review.googlesource.com/1104037Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Commit-Queue: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567946}

services/service_manager/sandbox/mac/renderer_v2.sb

@@ -18,11 +18,6 @@
   (path "/dev/autofs_nowait")
   (path "/dev/fd"))
 
-; Reads of signed Mach-O blobs created by the CVMS server.
-; https://crbug.com/850021
-(allow file-read-data
-  (prefix "/private/tmp/cvmsCodeSignObj"))
-
 (allow file-write-data
   (require-all
     (path "/dev/null")
@@ -42,10 +37,6 @@
   (subpath "/System/Library/Extensions")  ; https://crbug.com/847518
   (subpath "/System/Library/LinguisticData"))
 
-; Reads from /Library.
-(allow file-read-data
-  (subpath "/Library/GPUBundles"))  ; https://crbug.com/850021
-
 ; IOKit
 (allow iokit-open
   (iokit-registry-entry-class "IOSurfaceRootUserClient")
@@ -63,8 +54,6 @@
   ; crbug.com/792257
   (global-name "com.apple.distributed_notifications@Uv3")
   (global-name "com.apple.lsd.mapdb")
-  ; https://crbug.com/850021
-  (global-name "com.apple.cvmsServ")
   ; crbug.com/792217
   (global-name "com.apple.system.notification_center")
   (global-name "com.apple.windowserver.active"))