Add components and CLD to GN build.

components/data_reduction_proxy.gypi

Index: components/data_reduction_proxy.gypi
diff --git a/components/data_reduction_proxy.gypi b/components/data_reduction_proxy.gypi
index 2bdfaa1c5fae69a1b4e1dd9e6c3bcf27dc26414d..77f9f69de892519df46d687740ca6ffde75eeef3 100644
--- a/components/data_reduction_proxy.gypi
+++ b/components/data_reduction_proxy.gypi
@@ -6,6 +6,7 @@
 {
   'targets': [
     {
+      # GN version: //components/data_reduction_proxy/browser
       'target_name': 'data_reduction_proxy_browser',
       'type': 'static_library',
       'dependencies': [
@@ -19,6 +20,7 @@
         '..',
       ],
       'sources': [
+        # Note: sources list duplicated in GN build.
         'data_reduction_proxy/browser/data_reduction_proxy_auth_request_handler.cc',
         'data_reduction_proxy/browser/data_reduction_proxy_auth_request_handler.h',
         'data_reduction_proxy/browser/data_reduction_proxy_config_service.cc',
@@ -39,6 +41,7 @@
       ],
     },
     {
+      # GN version: //components/data_reduction_proxy/common
       'target_name': 'data_reduction_proxy_common',
       'type': 'static_library',
       'dependencies': [
@@ -48,6 +51,7 @@
         '..',
       ],
       'sources': [
+        # Note: sources list duplicated in GN build.
         'data_reduction_proxy/common/data_reduction_proxy_headers.cc',
         'data_reduction_proxy/common/data_reduction_proxy_headers.h',
         'data_reduction_proxy/common/data_reduction_proxy_pref_names.cc',
@@ -57,6 +61,7 @@
       ],
     },
     {
+      # GN version: //components/data_reduction_proxy/browser:test_support
       'target_name': 'data_reduction_proxy_test_support',
       'type': 'static_library',
       'dependencies' : [
@@ -72,6 +77,7 @@
         '..',
       ],
       'sources': [
+        # Note: sources list duplicated in GN build.
         'data_reduction_proxy/browser/data_reduction_proxy_params_test_utils.cc',
         'data_reduction_proxy/browser/data_reduction_proxy_params_test_utils.h',
         'data_reduction_proxy/browser/data_reduction_proxy_settings_test_utils.cc',