Remove dependency of //component:components_unittests on //content on iOS.

components/test/run_all_unittests.cc

Index: components/test/run_all_unittests.cc
diff --git a/components/test/run_all_unittests.cc b/components/test/run_all_unittests.cc
index 9edbe9c2e461a0f72e4debc2e237dc367ff70e7d..e9e32c6132ffe7185e7b0642e1a1b0c82564fa1a 100644
--- a/components/test/run_all_unittests.cc
+++ b/components/test/run_all_unittests.cc
@@ -10,13 +10,13 @@
 #include "base/test/launcher/unit_test_launcher.h"
 #include "base/test/test_suite.h"
 #include "components/content_settings/core/common/content_settings_pattern.h"
-#include "content/public/test/test_content_client_initializer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/ui_base_paths.h"
 #include "url/url_util.h"
 
 #if !defined(OS_IOS)
+#include "content/public/test/test_content_client_initializer.h"
 #include "ui/gl/test/gl_surface_test_support.h"
 #endif
 
@@ -97,6 +97,7 @@ class ComponentsTestSuite : public base::TestSuite {
   DISALLOW_COPY_AND_ASSIGN(ComponentsTestSuite);
 };
 
+#if !defined(OS_IOS)
 class ComponentsUnitTestEventListener : public testing::EmptyTestEventListener {
  public:
   ComponentsUnitTestEventListener() {}
@@ -115,17 +116,20 @@ class ComponentsUnitTestEventListener : public testing::EmptyTestEventListener {
 
   DISALLOW_COPY_AND_ASSIGN(ComponentsUnitTestEventListener);
 };
+#endif  // !defined(OS_IOS)
 
 }  // namespace
 
 int main(int argc, char** argv) {
   ComponentsTestSuite test_suite(argc, argv);
 
+#if !defined(OS_IOS)
   // The listener will set up common test environment for all components unit
   // tests.
   testing::TestEventListeners& listeners =
       testing::UnitTest::GetInstance()->listeners();
   listeners.Append(new ComponentsUnitTestEventListener());
+#endif  // !defined(OS_IOS)
 
   return base::LaunchUnitTests(
       argc, argv, base::Bind(&base::TestSuite::Run,