[policy] remove device_management_backend.pb.h include

device_management_backend.pb.h is 1.5MB.
Removing such header include reduces compile time of some files.
e.g.
compile time of obj/chrome/browser/browser/chrome_content_browser_client.o is improved from 30.2s to 29.7s.

Bug: 242216
Change-Id: If05857d45165756b6e86330f332280ad20ee3458
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1502318
Auto-Submit: Takuto Ikuta <tikuta@chromium.org>
Commit-Queue: Julian Pastarmov <pastarmovj@chromium.org>
Reviewed-by: Julian Pastarmov <pastarmovj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#637640}

chrome/browser/chromeos/policy/user_cloud_policy_store_chromeos.cc

@@ -16,6 +16,7 @@
 #include "chrome/browser/chromeos/policy/value_validation/onc_user_policy_value_validator.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chromeos/cryptohome/cryptohome_parameters.h"
+#include "components/policy/proto/device_management_backend.pb.h"
 #include "google_apis/gaia/gaia_auth_util.h"
 
 using RetrievePolicyResponseType =

components/policy/core/common/cloud/cloud_policy_store.cc

@@ -6,6 +6,7 @@
 
 #include "base/logging.h"
 #include "components/policy/core/common/cloud/cloud_external_data_manager.h"
+#include "components/policy/proto/device_management_backend.pb.h"
 
 namespace policy {
 
@@ -20,6 +21,11 @@ CloudPolicyStore::~CloudPolicyStore() {
   DCHECK(!external_data_manager_);
 }
 
+bool CloudPolicyStore::is_managed() const {
+  return policy_.get() &&
+         policy_->state() == enterprise_management::PolicyData::ACTIVE;
+}
+
 void CloudPolicyStore::Store(
     const enterprise_management::PolicyFetchResponse& policy,
     int64_t invalidation_version) {

components/policy/core/common/cloud/cloud_policy_store.h

@@ -16,7 +16,10 @@
 #include "components/policy/core/common/cloud/cloud_policy_validator.h"
 #include "components/policy/core/common/policy_map.h"
 #include "components/policy/policy_export.h"
-#include "components/policy/proto/device_management_backend.pb.h"
+
+namespace enterprise_management {
+class PolicyData;
+}
 
 namespace policy {
 
@@ -76,10 +79,7 @@ class POLICY_EXPORT CloudPolicyStore {
   const enterprise_management::PolicyData* policy() const {
     return policy_.get();
   }
-  bool is_managed() const {
-    return policy_.get() &&
-           policy_->state() == enterprise_management::PolicyData::ACTIVE;
-  }
+  bool is_managed() const;
   Status status() const { return status_; }
   CloudPolicyValidatorBase::Status validation_status() const {
     return validation_result_.get() ? validation_result_->status

components/policy/core/common/cloud/machine_level_user_cloud_policy_store.cc

@@ -7,6 +7,7 @@
 #include <utility>
 
 #include "components/policy/core/common/cloud/cloud_policy_constants.h"
+#include "components/policy/proto/device_management_backend.pb.h"
 
 namespace policy {
 namespace {

components/policy/core/common/cloud/mock_cloud_policy_store.cc

@@ -4,6 +4,8 @@
 
 #include "components/policy/core/common/cloud/mock_cloud_policy_store.h"
 
+#include "components/policy/proto/device_management_backend.pb.h"
+
 namespace policy {
 
 MockCloudPolicyStore::MockCloudPolicyStore() {}

components/policy/core/common/cloud/mock_user_cloud_policy_store.cc

@@ -3,7 +3,9 @@
 // found in the LICENSE file.
 
 #include "components/policy/core/common/cloud/mock_user_cloud_policy_store.h"
+
 #include "base/sequenced_task_runner.h"
+#include "components/policy/proto/device_management_backend.pb.h"
 
 namespace policy {
 

components/policy/core/common/cloud/policy_header_service.cc

@@ -12,6 +12,7 @@
 #include "base/values.h"
 #include "components/policy/core/common/cloud/cloud_policy_constants.h"
 #include "components/policy/core/common/cloud/cloud_policy_store.h"
+#include "components/policy/proto/device_management_backend.pb.h"
 
 namespace {
 const char kUserDMTokenKey[] = "user_dmtoken";

components/policy/core/common/cloud/policy_header_service_unittest.cc

@@ -14,6 +14,7 @@
 #include "base/values.h"
 #include "components/policy/core/common/cloud/cloud_policy_constants.h"
 #include "components/policy/core/common/cloud/mock_cloud_policy_store.h"
+#include "components/policy/proto/device_management_backend.pb.h"
 #include "net/http/http_request_headers.h"
 #include "net/traffic_annotation/network_traffic_annotation_test_helper.h"
 #include "testing/gtest/include/gtest/gtest.h"

components/policy/core/common/cloud/user_cloud_policy_store_base.cc

@@ -12,6 +12,7 @@
 #include "components/policy/core/common/policy_map.h"
 #include "components/policy/core/common/policy_proto_decoders.h"
 #include "components/policy/proto/cloud_policy.pb.h"
+#include "components/policy/proto/device_management_backend.pb.h"
 
 namespace policy {