Add sleep blocker for Mac.

BUG=34081
TEST=as in bug

Review URL: http://codereview.chromium.org/5360001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@67267 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 38 insertions, 1 deletions

diff --git a/chrome/browser/power_save_blocker_mac.cc b/chrome/browser/power_save_blocker_mac.cc
new file mode 100644
index 0000000..12a40ec
--- /dev/null
+++ b/chrome/browser/power_save_blocker_mac.cc
@@ -0,0 +1,36 @@
+// Copyright (c) 2010 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 "chrome/browser/power_save_blocker.h"
+
+#include <IOKit/pwr_mgt/IOPMLib.h>
+
+#include "chrome/browser/browser_thread.h"
+
+// Run on the UI thread only.
+void PowerSaveBlocker::ApplyBlock(bool blocking) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  // Block just idle sleep; allow display sleep.
+  // See QA1340 <http://developer.apple.com/library/mac/#qa/qa2004/qa1340.html>
+  // for more details.
+
+  static IOPMAssertionID sleep_assertion = kIOPMNullAssertionID;
+  IOReturn result;
+  if (blocking) {
+    DCHECK_EQ(sleep_assertion, kIOPMNullAssertionID);
+    result = IOPMAssertionCreate(
+        kIOPMAssertionTypeNoIdleSleep,
+        kIOPMAssertionLevelOn,
+        &sleep_assertion);
+  } else {
+    DCHECK_NE(sleep_assertion, kIOPMNullAssertionID);
+    result = IOPMAssertionRelease(sleep_assertion);
+    sleep_assertion = kIOPMNullAssertionID;
+  }
+
+  if (result != kIOReturnSuccess) {
+    NOTREACHED();
+  }
+}
diff --git a/chrome/browser/power_save_blocker_stub.cc b/chrome/browser/power_save_blocker_stub.cc
index a509e63..2c1a7e3 100644
--- a/chrome/browser/power_save_blocker_stub.cc
+++ b/chrome/browser/power_save_blocker_stub.cc
@@ -8,5 +8,4 @@
 
 void PowerSaveBlocker::ApplyBlock(bool blocking) {
   // http://code.google.com/p/chromium/issues/detail?id=33605
-  // http://code.google.com/p/chromium/issues/detail?id=34081
 }
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index bd4cbbf..ebadabe 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -2456,6 +2456,7 @@
         'browser/possible_url_model.h',
         'browser/power_save_blocker.h',
         'browser/power_save_blocker_common.cc',
+        'browser/power_save_blocker_mac.cc',
         'browser/power_save_blocker_stub.cc',
         'browser/power_save_blocker_win.cc',
         'browser/ppapi_plugin_process_host.cc',
@@ -3584,6 +3585,7 @@
             'browser/importer/nss_decryptor_system_nss.h',
             'browser/jankometer.cc',
             'browser/password_manager/login_database_posix.cc',
+            'browser/power_save_blocker_stub.cc',
             'browser/renderer_host/backing_store_proxy.cc',
             'browser/renderer_host/backing_store_proxy.h',
             'browser/renderer_host/gpu_view_host.cc',