refactor to Introduce AUDIO_CAPTURE and VIDEO_CAPTURE permissions.

android_webview/browser/aw_permission_manager.cc

Index: android_webview/browser/aw_permission_manager.cc
diff --git a/android_webview/browser/aw_permission_manager.cc b/android_webview/browser/aw_permission_manager.cc
index ff45d2076d83e0ed73f1ffb9163f49d0a03a3e7e..a92910e105757a97f1fbe91906e4d21c4a00ac4a 100644
--- a/android_webview/browser/aw_permission_manager.cc
+++ b/android_webview/browser/aw_permission_manager.cc
@@ -208,6 +208,8 @@ void AwPermissionManager::RequestPermission(
                              result_cache_->GetWeakPtr(), callback, permission,
                              origin, embedding_origin));
       break;
+    case PermissionType::AUDIO_RECORDING:

[xhwang, 2015/08/27 19:25:17]

It seems to me that

AUDIO_RECORDING == MIC
VIDEO_RECORDING == CAMERA

Why do we use two different sets of names here? It'd be easier to read/remember
if we use consistent names across layers. Also, all other permission types are
using consistent names.

+    case PermissionType::VIDEO_RECORDING:
     case PermissionType::NOTIFICATIONS:
     case PermissionType::PUSH_MESSAGING:
     case PermissionType::DURABLE_STORAGE:
@@ -259,6 +261,8 @@ void AwPermissionManager::CancelPermissionRequest(
     case PermissionType::NOTIFICATIONS:
     case PermissionType::PUSH_MESSAGING:
     case PermissionType::DURABLE_STORAGE:
+    case PermissionType::AUDIO_RECORDING:
+    case PermissionType::VIDEO_RECORDING:
       NOTIMPLEMENTED() << "CancelPermission not implemented for "
                        << static_cast<int>(permission);
       break;