Add an extension API event about screen brightness change.

BUG=chromium-os:20007
TEST=None


Review URL: http://codereview.chromium.org/9193005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@119042 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 13 insertions, 0 deletions

diff --git a/chrome/browser/extensions/system/system_api.cc b/chrome/browser/extensions/system/system_api.cc
index fae6bc3..bdd1677 100644
--- a/chrome/browser/extensions/system/system_api.cc
+++ b/chrome/browser/extensions/system/system_api.cc
@@ -30,9 +30,11 @@ const char* kIncognitoModeAvailabilityStrings[] = {
 };
 
 // Property keys.
+const char kBrightnessKey[] = "brightness";
 const char kDownloadProgressKey[] = "downloadProgress";
 const char kIsVolumeMutedKey[] = "isVolumeMuted";
 const char kStateKey[] = "state";
+const char kUserInitiatedKey[] = "userInitiated";
 const char kVolumeKey[] = "volume";
 
 // System update states.
@@ -41,6 +43,7 @@ const char kUpdatingState[] = "Updating";
 const char kNeedRestartState[] = "NeedRestart";
 
 // Event names.
+const char kOnBrightnessChanged[] = "systemPrivate.onBrightnessChanged";
 const char kOnVolumeChanged[] = "systemPrivate.onVolumeChanged";
 const char kOnScreenUnlocked[] = "systemPrivate.onScreenUnlocked";
 const char kOnWokeUp[] = "systemPrivate.onWokeUp";
@@ -138,6 +141,15 @@ void DispatchVolumeChangedEvent(double volume, bool is_volume_muted) {
   DispatchEvent(kOnVolumeChanged, args);
 }
 
+void DispatchBrightnessChangedEvent(int brightness, bool user_initiated) {
+  ListValue args;
+  DictionaryValue* dict = new DictionaryValue();
+  dict->SetInteger(kBrightnessKey, brightness);
+  dict->SetBoolean(kUserInitiatedKey, user_initiated);
+  args.Append(dict);
+  DispatchEvent(kOnBrightnessChanged, args);
+}
+
 void DispatchScreenUnlockedEvent() {
   ListValue args;
   DispatchEvent(kOnScreenUnlocked, args);
diff --git a/chrome/browser/extensions/system/system_api.h b/chrome/browser/extensions/system/system_api.h
index daebcc7..24fdfb2 100644
--- a/chrome/browser/extensions/system/system_api.h
+++ b/chrome/browser/extensions/system/system_api.h
@@ -27,6 +27,7 @@ class GetUpdateStatusFunction : public SyncExtensionFunction {
   DECLARE_EXTENSION_FUNCTION_NAME("systemPrivate.getUpdateStatus")
 };
 
+void DispatchBrightnessChangedEvent(int brightness, bool user_initiated);
 void DispatchVolumeChangedEvent(double volume, bool is_volume_muted);
 void DispatchScreenUnlockedEvent();
 void DispatchWokeUpEvent();