Remove old iossim code (pre-Xcode 8) and class-dump.

testing/iossim/BUILD.gn

Index: testing/iossim/BUILD.gn
diff --git a/testing/iossim/BUILD.gn b/testing/iossim/BUILD.gn
index 97fa2c8797b0a0d30af55ca1f114ae2de54bf45e..a42d4a5c372dc0fbc3d4e759d37cf12eb7c2c5fa 100644
--- a/testing/iossim/BUILD.gn
+++ b/testing/iossim/BUILD.gn
@@ -3,7 +3,6 @@
 # found in the LICENSE file.
 
 import("//build/config/mac/mac_sdk.gni")
-import("//third_party/class-dump/class-dump.gni")
 
 if (current_toolchain == host_toolchain) {
   config("config") {
@@ -11,10 +10,9 @@ if (current_toolchain == host_toolchain) {
 
     include_dirs = [ "$root_gen_dir/iossim" ]
 
-    # TODO(crbug.com/595295): Building class-dump tools requires OS X SDK
-    # version 10.9 or higher. Remove this override once the global version
-    # of the SDK is raised.
-    common_flags = [ "-mmacosx-version-min=10.9" ]
+    # -objectForKeyedSubscript requires 10.8 or newer. Remove this override once
+    # the global version of the SDK is raised.
+    common_flags = [ "-mmacosx-version-min=10.8" ]
     ldflags = common_flags
     cflags_objcc = common_flags
   }
@@ -24,36 +22,7 @@ if (current_toolchain == host_toolchain) {
       "iossim.mm",
     ]
     libs = [ "Foundation.framework" ]
-    deps = [
-      ":generate_dvt_core_simulator",
-      ":generate_dvt_foundation_header",
-      ":generate_dvt_iphone_sim_header",
-    ]
     configs += [ ":config" ]
-
-    # TODO(crbug.com/595295): Building class-dump tools requires OS X SDK
-    # version 10.9 or higher. To prevent mixing code using different value
-    # of minimum SDK supported, forbids dependencies on any Chromium target.
-    assert_no_deps = [ "//base/*" ]
-  }
-
-  class_dump("generate_dvt_core_simulator") {
-    framework_name = "CoreSimulator"
-    framework_path = "$mac_sdk_path/../../../../../Library/PrivateFrameworks"
-    class_dump_filter = "Sim"
-  }
-
-  class_dump("generate_dvt_foundation_header") {
-    framework_name = "DVTFoundation"
-    framework_path = "$mac_sdk_path/../../../../../../SharedFrameworks"
-    class_dump_filter = "DVTStackBacktrace|DVTInvalidation|DVTMixIn"
-  }
-
-  class_dump("generate_dvt_iphone_sim_header") {
-    topological_sort = true
-    framework_name = "DVTiPhoneSimulatorRemoteClient"
-    framework_path = "$mac_sdk_path/../../../../../../SharedFrameworks"
-    class_dump_filter = "iPhoneSimulator"
   }
 } else if (current_toolchain == default_toolchain) {
   copy("iossim") {