Mojoify PoweMonitorMessageBroadcaster IPC from browser to child process

content/browser/browser_child_process_host_impl.cc

 // Copyright (c) 2012 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.
 
 #include "content/browser/browser_child_process_host_impl.h"
 
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/dump_without_crashing.h"
 #include "base/feature_list.h"
 #include "base/files/file_path.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/persistent_histogram_allocator.h"
 #include "base/metrics/persistent_memory_allocator.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "components/tracing/common/tracing_switches.h"
 #include "content/browser/histogram_message_filter.h"
 #include "content/browser/loader/resource_message_filter.h"
 #include "content/browser/memory/memory_message_filter.h"
+#include "content/browser/power_monitor_message_broadcaster.h"
 #include "content/browser/profiler_message_filter.h"
 #include "content/browser/service_manager/service_manager_context.h"
 #include "content/browser/tracing/trace_message_filter.h"
 #include "content/common/child_process_host_impl.h"
 #include "content/common/child_process_messages.h"
 #include "content/common/service_manager/child_connection.h"
 #include "content/public/browser/browser_child_process_host_delegate.h"
 #include "content/public/browser/browser_child_process_observer.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/child_process_data.h"
 #include "content/public/browser/content_browser_client.h"
+#include "content/public/common/connection_filter.h"
 #include "content/public/common/content_features.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/mojo_channel_switches.h"
 #include "content/public/common/process_type.h"
 #include "content/public/common/result_codes.h"
+#include "content/public/common/service_manager_connection.h"
 #include "ipc/attachment_broker.h"
 #include "ipc/attachment_broker_privileged.h"
 #include "mojo/edk/embedder/embedder.h"
+#include "services/service_manager/public/cpp/interface_registry.h"
 
 #if defined(OS_MACOSX)
 #include "content/browser/mach_broker_mac.h"
 #endif
 
 namespace content {
 namespace {
 
 static base::LazyInstance<BrowserChildProcessHostImpl::BrowserChildProcessList>
     g_child_process_list = LAZY_INSTANCE_INITIALIZER;
@@ skipping 51 matching lines @@
   }
   return nullptr;
 }
 
 #if defined(OS_MACOSX)
 base::PortProvider* BrowserChildProcessHost::GetPortProvider() {
   return MachBroker::GetInstance();
 }
 #endif
 
+class BrowserChildProcessHost::ConnectionFilterImpl : public ConnectionFilter {
+ public:
+  ConnectionFilterImpl() {}
+
+ private:
+  // ConnectionFilter:
+  bool OnConnect(const service_manager::Identity& remote_identity,
+                 service_manager::InterfaceRegistry* registry,
+                 service_manager::Connector* connector) override {
+    registry->AddInterface(base::Bind(&PowerMonitorMessageBroadcaster::Create));
+    return true;
+  }
+
+  DISALLOW_COPY_AND_ASSIGN(ConnectionFilterImpl);
+};
+
 // static
 BrowserChildProcessHostImpl::BrowserChildProcessList*
     BrowserChildProcessHostImpl::GetIterator() {
   return g_child_process_list.Pointer();
 }
 
 // static
 void BrowserChildProcessHostImpl::AddObserver(
     BrowserChildProcessObserver* observer) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   g_observers.Get().AddObserver(observer);
 }
 
 // static
 void BrowserChildProcessHostImpl::RemoveObserver(
     BrowserChildProcessObserver* observer) {
   // TODO(phajdan.jr): Check thread after fixing http://crbug.com/167126.
   g_observers.Get().RemoveObserver(observer);
 }
 
 BrowserChildProcessHostImpl::BrowserChildProcessHostImpl(
     content::ProcessType process_type,
     BrowserChildProcessHostDelegate* delegate,
     const std::string& service_name)
     : data_(process_type),
       delegate_(delegate),
       child_token_(mojo::edk::GenerateRandomToken()),
-      power_monitor_message_broadcaster_(this),
       is_channel_connected_(false),
       notify_child_disconnected_(false),
       weak_factory_(this) {
   data_.id = ChildProcessHostImpl::GenerateChildProcessUniqueId();
 
 #if USE_ATTACHMENT_BROKER
   // Construct the privileged attachment broker early in the life cycle of a
   // child process. This ensures that when a test is being run in one of the
   // single process modes, the global attachment broker is the privileged
   // attachment broker, rather than an unprivileged attachment broker.
 #if defined(OS_MACOSX)
   IPC::AttachmentBrokerPrivileged::CreateBrokerIfNeeded(
       MachBroker::GetInstance());
 #else
   IPC::AttachmentBrokerPrivileged::CreateBrokerIfNeeded();
 #endif  // defined(OS_MACOSX)
 #endif  // USE_ATTACHMENT_BROKER
 
   child_process_host_.reset(ChildProcessHost::Create(this));
   AddFilter(new TraceMessageFilter(data_.id));
   AddFilter(new ProfilerMessageFilter(process_type));
   AddFilter(new HistogramMessageFilter);
   AddFilter(new MemoryMessageFilter(this, process_type));
 
   g_child_process_list.Get().push_back(this);
   GetContentClient()->browser()->BrowserChildProcessHostCreated(this);
 
-  power_monitor_message_broadcaster_.Init();
-
   if (!service_name.empty()) {
     DCHECK_CURRENTLY_ON(BrowserThread::IO);
     child_connection_.reset(new ChildConnection(
         service_name, base::StringPrintf("%d", data_.id), child_token_,
         ServiceManagerContext::GetConnectorForIOThread(),
         base::ThreadTaskRunnerHandle::Get()));
   }
 
+  // May be null during test execution.
+  if (ServiceManagerConnection::GetForProcess()) {
+    ServiceManagerConnection::GetForProcess()->AddConnectionFilter(
+        base::MakeUnique<ConnectionFilterImpl>());
+  }
+
   // Create a persistent memory segment for subprocess histograms.
   CreateMetricsAllocator();
 }
 
 BrowserChildProcessHostImpl::~BrowserChildProcessHostImpl() {
   g_child_process_list.Get().remove(this);
 
   if (notify_child_disconnected_) {
     BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
                             base::Bind(&NotifyProcessHostDisconnected, data_));
@@ skipping 403 matching lines @@
 
 #if defined(OS_WIN)
 
 void BrowserChildProcessHostImpl::OnObjectSignaled(HANDLE object) {
   OnChildDisconnected();
 }
 
 #endif
 
 }  // namespace content