<webview>: First stab at implementing media permission request for guests.

content/renderer/browser_plugin/browser_plugin_constants.cc

Index: content/renderer/browser_plugin/browser_plugin_constants.cc
diff --git a/content/renderer/browser_plugin/browser_plugin_constants.cc b/content/renderer/browser_plugin/browser_plugin_constants.cc
index 8b3551bac76346eef68189dd99e54ab52d8da55e..fb5225629b35ab4e1019ba42ace30a6c63873284 100644
--- a/content/renderer/browser_plugin/browser_plugin_constants.cc
+++ b/content/renderer/browser_plugin/browser_plugin_constants.cc
@@ -17,6 +17,7 @@ const char kMethodGetProcessId[] = "getProcessId";
 const char kMethodGetRouteId[] = "getRouteId";
 const char kMethodGo[] = "go";
 const char kMethodReload[] = "reload";
+const char kMethodSetMediaPermission[] = "-internal-setMediaPermission";
 const char kMethodStop[] = "stop";
 const char kMethodTerminate[] = "terminate";
 
@@ -38,6 +39,7 @@ const char kEventLoadCommit[] = "loadcommit";
 const char kEventLoadRedirect[] = "loadredirect";
 const char kEventLoadStart[] = "loadstart";
 const char kEventLoadStop[] = "loadstop";
+const char kEventRequestPermission[] = "permissionrequest";
 const char kEventResponsive[] = "responsive";
 const char kEventSizeChanged[] = "sizechanged";
 const char kEventUnresponsive[] = "unresponsive";
@@ -50,9 +52,12 @@ const char kNewWidth[] = "newWidth";
 const char kOldURL[] = "oldUrl";
 const char kOldHeight[] = "oldHeight";
 const char kOldWidth[] = "oldWidth";
+const char kPermission[] = "permission";
+const char kPermissionTypeMedia[] = "media";
 const char kPersistPrefix[] = "persist:";
 const char kProcessId[] = "processId";
 const char kReason[] = "reason";
+const char kRequestId[] = "request_id";
 const char kURL[] = "url";
 
 // Error messages.