Split //ios/chrome/browser in multiple targets.

ios/chrome/browser/favicon/BUILD.gn

Index: ios/chrome/browser/favicon/BUILD.gn
diff --git a/ios/chrome/browser/favicon/BUILD.gn b/ios/chrome/browser/favicon/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..ed5ec6a8dbad220218e60c77fd3da65a99dddd8f
--- /dev/null
+++ b/ios/chrome/browser/favicon/BUILD.gn
@@ -0,0 +1,57 @@
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+source_set("favicon") {
+  sources = [
+    "favicon_attributes.h",
+    "favicon_attributes.mm",
+    "favicon_attributes_provider.h",
+    "favicon_attributes_provider.mm",
+    "favicon_client_impl.h",
+    "favicon_client_impl.mm",
+    "favicon_loader.h",
+    "favicon_loader.mm",
+    "favicon_service_factory.cc",
+    "favicon_service_factory.h",
+    "ios_chrome_favicon_loader_factory.h",
+    "ios_chrome_favicon_loader_factory.mm",
+    "ios_chrome_large_icon_cache_factory.cc",
+    "ios_chrome_large_icon_cache_factory.h",
+    "ios_chrome_large_icon_service_factory.cc",
+    "ios_chrome_large_icon_service_factory.h",
+    "large_icon_cache.cc",
+    "large_icon_cache.h",
+  ]
+  deps = [
+    "//base",
+    "//components/favicon/core",
+    "//components/favicon_base",
+    "//components/keyed_service/core",
+    "//components/keyed_service/ios",
+    "//ios/chrome/browser:browser_no_public_deps",
+    "//ios/chrome/browser/browser_state",
+    "//ios/chrome/browser/history",
+    "//ios/public/provider/chrome/browser",
+    "//ios/web",
+    "//skia",
+    "//ui/gfx",
+    "//url",
+  ]
+}
+
+source_set("unit_tests") {
+  testonly = true
+  sources = [
+    "large_icon_cache_unittest.cc",
+  ]
+  deps = [
+    ":favicon",
+    "//base",
+    "//components/favicon_base",
+    "//skia",
+    "//testing/gtest",
+    "//ui/gfx",
+    "//ui/gfx:test_support",
+  ]
+}