Adds extension APIs of events on changing volume.

chrome/common/extensions/api/extension_api.json

Index: chrome/common/extensions/api/extension_api.json
diff --git a/chrome/common/extensions/api/extension_api.json b/chrome/common/extensions/api/extension_api.json
index 7c6ca95e22abaea1fdb47e0d1dc3560a1cdbe9b8..c60398154f52efb47e3c5172eb58865e5efd32c6 100644
--- a/chrome/common/extensions/api/extension_api.json
+++ b/chrome/common/extensions/api/extension_api.json
@@ -503,6 +503,42 @@
             "description": "Information about the menu that was closed."
           }
         ]
+      },
+      {
+        "name": "onVolumeDown",
+        "type": "function",
+        "description": "Fired when the volume is down.",

[dmazzoni, 2011/08/24 14:49:02]

down -> decreased

[yoshiki, 2011/08/29 09:16:16]

This was replaced with onVolumeChange.

On 2011/08/24 14:49:02, Dominic Mazzoni wrote:

+        "parameters": [
+          {
+            "$ref": "AccessibilityObject",

[dmazzoni, 2011/08/24 14:49:02]

Make this an AccessibilityVolumeInfo explicitly rather than a generic
AccessibilityObject.

[yoshiki, 2011/08/29 09:16:16]

Done.

+            "name": "volume",
+            "description": "Information about the volume was down."

[dmazzoni, 2011/08/24 14:49:02]

Information about the current volume level

[yoshiki, 2011/08/29 09:16:16]

Done.

+          }
+        ]
+      },
+      {
+        "name": "onVolumeUp",
+        "type": "function",
+        "description": "Fired when the volume is up.",
+        "parameters": [
+          {
+            "$ref": "AccessibilityObject",
+            "name": "volume",
+            "description": "Information about the volume was up."

[Daniel Erat, 2011/08/24 14:52:57]

"Information about the volume increasing."

[yoshiki, 2011/08/29 09:16:16]

This was replaced with onVolumeChange.

On 2011/08/24 14:52:57, Daniel Erat wrote:

+          }
+        ]
+      },
+      {
+        "name": "onVolumeMute",
+        "type": "function",
+        "description": "Fired when the volume is muted.",
+        "parameters": [
+          {
+            "$ref": "AccessibilityObject",
+            "name": "volume",
+            "description": "Information about the volume was muted."

[Daniel Erat, 2011/08/24 14:52:57]

"Information about the volume being muted."

[yoshiki, 2011/08/29 09:16:16]

Done.

+          }
+        ]
       }
     ]
   },