OCMock for Mac tests

[justinmc]

OCMock is currently set up only for iOS, but I need it in a Mac test in flutter/engine#20531.

[gaaclarke]

If you do this then make your macos target depend on ocmock_src it fixes your mac problem and keeps iOS building:

# Copyright 2013 The Flutter Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

#assert(is_ios)

ocmock_path = "//third_party/ocmock/Source"

# OCMock headers use `#import <OCMock/Foo.h>`.
config("ocmock_config") {
  include_dirs = [ "$ocmock_path" ]
}

source_set("ocmock_src") {
  configs -= [ "//build/config/compiler:chromium_code" ]
  all_dependent_configs = [ ":ocmock_config" ]
  cflags = [
    "-fvisibility=default",
    "-Wno-misleading-indentation",
  ]
  sources = [
    "$ocmock_path/OCMock/NSInvocation+OCMAdditions.h",
    "$ocmock_path/OCMock/NSInvocation+OCMAdditions.m",
    "$ocmock_path/OCMock/NSMethodSignature+OCMAdditions.h",
    "$ocmock_path/OCMock/NSMethodSignature+OCMAdditions.m",
    "$ocmock_path/OCMock/NSNotificationCenter+OCMAdditions.h",
    "$ocmock_path/OCMock/NSNotificationCenter+OCMAdditions.m",
    "$ocmock_path/OCMock/NSObject+OCMAdditions.h",
    "$ocmock_path/OCMock/NSObject+OCMAdditions.m",
    "$ocmock_path/OCMock/NSValue+OCMAdditions.h",
    "$ocmock_path/OCMock/NSValue+OCMAdditions.m",
    "$ocmock_path/OCMock/OCClassMockObject.h",
    "$ocmock_path/OCMock/OCClassMockObject.m",
    "$ocmock_path/OCMock/OCMArg.h",
    "$ocmock_path/OCMock/OCMArg.m",
    "$ocmock_path/OCMock/OCMArgAction.h",
    "$ocmock_path/OCMock/OCMArgAction.m",
    "$ocmock_path/OCMock/OCMBlockArgCaller.h",
    "$ocmock_path/OCMock/OCMBlockArgCaller.m",
    "$ocmock_path/OCMock/OCMBlockCaller.h",
    "$ocmock_path/OCMock/OCMBlockCaller.m",
    "$ocmock_path/OCMock/OCMBoxedReturnValueProvider.h",
    "$ocmock_path/OCMock/OCMBoxedReturnValueProvider.m",
    "$ocmock_path/OCMock/OCMConstraint.h",
    "$ocmock_path/OCMock/OCMConstraint.m",
    "$ocmock_path/OCMock/OCMExceptionReturnValueProvider.h",
    "$ocmock_path/OCMock/OCMExceptionReturnValueProvider.m",
    "$ocmock_path/OCMock/OCMExpectationRecorder.h",
    "$ocmock_path/OCMock/OCMExpectationRecorder.m",
    "$ocmock_path/OCMock/OCMFunctions.h",
    "$ocmock_path/OCMock/OCMFunctions.m",
    "$ocmock_path/OCMock/OCMFunctionsPrivate.h",
    "$ocmock_path/OCMock/OCMIndirectReturnValueProvider.h",
    "$ocmock_path/OCMock/OCMIndirectReturnValueProvider.m",
    "$ocmock_path/OCMock/OCMInvocationExpectation.h",
    "$ocmock_path/OCMock/OCMInvocationExpectation.m",
    "$ocmock_path/OCMock/OCMInvocationMatcher.h",
    "$ocmock_path/OCMock/OCMInvocationMatcher.m",
    "$ocmock_path/OCMock/OCMInvocationStub.h",
    "$ocmock_path/OCMock/OCMInvocationStub.m",
    "$ocmock_path/OCMock/OCMLocation.h",
    "$ocmock_path/OCMock/OCMLocation.m",
    "$ocmock_path/OCMock/OCMMacroState.h",
    "$ocmock_path/OCMock/OCMMacroState.m",
    "$ocmock_path/OCMock/OCMNotificationPoster.h",
    "$ocmock_path/OCMock/OCMNotificationPoster.m",
    "$ocmock_path/OCMock/OCMObserverRecorder.h",
    "$ocmock_path/OCMock/OCMObserverRecorder.m",
    "$ocmock_path/OCMock/OCMPassByRefSetter.h",
    "$ocmock_path/OCMock/OCMPassByRefSetter.m",
    "$ocmock_path/OCMock/OCMRealObjectForwarder.h",
    "$ocmock_path/OCMock/OCMRealObjectForwarder.m",
    "$ocmock_path/OCMock/OCMRecorder.h",
    "$ocmock_path/OCMock/OCMRecorder.m",
    "$ocmock_path/OCMock/OCMReturnValueProvider.h",
    "$ocmock_path/OCMock/OCMReturnValueProvider.m",
    "$ocmock_path/OCMock/OCMStubRecorder.h",
    "$ocmock_path/OCMock/OCMStubRecorder.m",
    "$ocmock_path/OCMock/OCMVerifier.h",
    "$ocmock_path/OCMock/OCMVerifier.m",
    "$ocmock_path/OCMock/OCMock.h",
    "$ocmock_path/OCMock/OCMockObject.h",
    "$ocmock_path/OCMock/OCMockObject.m",
    "$ocmock_path/OCMock/OCObserverMockObject.h",
    "$ocmock_path/OCMock/OCObserverMockObject.m",
    "$ocmock_path/OCMock/OCPartialMockObject.h",
    "$ocmock_path/OCMock/OCPartialMockObject.m",
    "$ocmock_path/OCMock/OCProtocolMockObject.h",
    "$ocmock_path/OCMock/OCProtocolMockObject.m",
  ]
}

# This is a static library so it can be used by xcode's build system too.
static_library("ocmock") {
  if (is_ios) {
    cflags = [
      "-mios-simulator-version-min=$ios_testing_deployment_target",
    ]
  }
  public_deps = [
    ":ocmock_src",
  ]
}