Revert 120063 - Remove hand-rolled cases of protobufs generations/compilation

chrome/app/policy/cloud_policy_codegen.gyp

Index: chrome/app/policy/cloud_policy_codegen.gyp
===================================================================
--- chrome/app/policy/cloud_policy_codegen.gyp	(revision 120065)
+++ chrome/app/policy/cloud_policy_codegen.gyp	(working copy)
@@ -60,17 +60,37 @@
     {
       'target_name': 'cloud_policy_proto_compile',
       'type': 'none',
-      'sources': [
-        '<(policy_out_dir)/policy/cloud_policy.proto',
+      'actions': [
+        {
+          'action_name': 'compile_generated_proto',
+          'inputs': [
+            '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)protoc<(EXECUTABLE_SUFFIX)',
+            '<(policy_out_dir)/policy/cloud_policy.proto',
+          ],
+          'outputs': [
+            '<(PRODUCT_DIR)/pyproto/device_management_pb/cloud_policy_pb2.py',
+            '<(protoc_out_dir)/<(proto_path_substr)/cloud_policy.pb.h',
+            '<(protoc_out_dir)/<(proto_path_substr)/cloud_policy.pb.cc',
+          ],
+          'action': [
+            '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)protoc<(EXECUTABLE_SUFFIX)',
+            '--proto_path=<(policy_out_dir)/policy',
+            '<(policy_out_dir)/policy/cloud_policy.proto',
+            '--cpp_out=<(protoc_out_dir)/<(proto_path_substr)',
+            '--python_out=<(PRODUCT_DIR)/pyproto/device_management_pb',
+          ],
+          'message': 'Compiling generated cloud policy protobuf',
+        },
       ],
-      'variables': {
-        'proto_in_dir': '<(policy_out_dir)/policy',
-        'proto_out_dir': '<(proto_path_substr)',
-      },
       'dependencies': [
+        '<(DEPTH)/third_party/protobuf/protobuf.gyp:protoc#host',
         'cloud_policy_code_generate',
       ],
-      'includes': [ '../../../build/protoc.gypi' ],
+      'direct_dependent_settings': {
+        'include_dirs': [
+          '<(protoc_out_dir)',
+        ]
+      },
     },
     {
       'target_name': 'cloud_policy_backend_header_compile',
@@ -81,14 +101,36 @@
         '<(proto_rel_path)/device_management_local.proto',
         '<(proto_rel_path)/old_generic_format.proto',
       ],
-      'variables': {
-        'proto_in_dir': '<(proto_rel_path)',
-        'proto_out_dir': '<(proto_path_substr)',
-      },
+      'rules': [
+        {
+          'rule_name': 'gen_proto',
+          'extension': 'proto',
+          'inputs': [
+            '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)protoc<(EXECUTABLE_SUFFIX)',
+          ],
+          'outputs': [
+            '<(PRODUCT_DIR)/pyproto/device_management_pb/<(RULE_INPUT_ROOT)_pb2.py',
+            '<(protoc_out_dir)/<(proto_path_substr)/<(RULE_INPUT_ROOT).pb.h',
+            '<(protoc_out_dir)/<(proto_path_substr)/<(RULE_INPUT_ROOT).pb.cc',
+          ],
+          'action': [
+            '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)protoc<(EXECUTABLE_SUFFIX)',
+            '--proto_path=<(proto_rel_path)',
+            '<(proto_rel_path)/<(RULE_INPUT_NAME)',
+            '--cpp_out=<(protoc_out_dir)/<(proto_path_substr)',
+            '--python_out=<(PRODUCT_DIR)/pyproto/device_management_pb',
+          ],
+          'message': 'Generating C++ and Python code from <(RULE_INPUT_PATH)',
+        },
+      ],
       'dependencies': [
-        'cloud_policy_code_generate',
+        '<(DEPTH)/third_party/protobuf/protobuf.gyp:protoc#host',
       ],
-      'includes': [ '../../../build/protoc.gypi' ],
+      'direct_dependent_settings': {
+        'include_dirs': [
+          '<(protoc_out_dir)',
+        ]
+      },
     },
     {
       'target_name': 'policy',