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

content/common/browser_plugin_messages.h

 // Copyright (c) 2012 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.
 
 // Multiply-included message header, no traditional include guard.
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/process.h"
 #include "content/common/content_export.h"
 #include "content/common/content_param_traits.h"
 #include "content/public/common/common_param_traits.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_message_utils.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebDragOperation.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDragStatus.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebDragOperation.h"
 #include "ui/gfx/point.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/size.h"
 #include "webkit/glue/webcursor.h"
 #include "webkit/glue/webdropdata.h"
 
 #undef IPC_MESSAGE_EXPORT
 #define IPC_MESSAGE_EXPORT CONTENT_EXPORT
 
 #define IPC_MESSAGE_START BrowserPluginMsgStart
@@ skipping 195 matching lines @@
                     WebKit::WebDragOperationsMask /* operation_mask */,
                     gfx::Point /* plugin_location */)
 
 // Response to BrowserPluginMsg_PluginAtPositionRequest, returns the browser
 // plugin instace id and the coordinates (local to the plugin).
 IPC_MESSAGE_ROUTED3(BrowserPluginHostMsg_PluginAtPositionResponse,
                     int /* instance_id */,
                     int /* request_id */,
                     gfx::Point /* position */)
 
+// Tells the guest that its request for media permission has been allowed or
+// denied.
+// Note that |allow| = true does not readily mean that the guest will be granted
+// permission, since a security check in the embedder will follow. The guest
+// will be granted permission only if its embedder also has access to media.
+IPC_MESSAGE_ROUTED3(BrowserPluginHostMsg_AllowMediaAccess,
+                    int /* instance_id */,
+                    int /* request_id */,
+                    bool /* allow */)
+
 // -----------------------------------------------------------------------------
 // These messages are from the guest renderer to the browser process
 
 // A embedder sends this message to the browser when it wants
 // to resize a guest plugin container so that the guest is relaid out
 // according to the new size.
 IPC_MESSAGE_ROUTED2(BrowserPluginHostMsg_ResizeGuest,
                     int /* instance_id*/,
                     BrowserPluginHostMsg_ResizeGuest_Params)
 
@@ skipping 54 matching lines @@
 IPC_MESSAGE_ROUTED2(BrowserPluginMsg_GuestUnresponsive,
                     int /* instance_id */,
                     int /* process_id */)
 
 // When the guest begins responding again, the browser process informs the
 // embedder through this message.
 IPC_MESSAGE_ROUTED2(BrowserPluginMsg_GuestResponsive,
                     int /* instance_id */,
                     int /* process_id */)
 
+// When the guest requests media access, the browser process forwards this
+// request to the embeddder through this message.
+IPC_MESSAGE_ROUTED3(BrowserPluginMsg_RequestMediaAccess,
+                    int /* instance_id */,
+                    int /* request_id */,
+                    GURL /* security_origin */)
+
 // When the user tabs to the end of the tab stops of a guest, the browser
 // process informs the embedder to tab out of the browser plugin.
 IPC_MESSAGE_ROUTED2(BrowserPluginMsg_AdvanceFocus,
                     int /* instance_id */,
                     bool /* reverse */)
 
 // When the guest starts/stops listening to touch events, it needs to notify the
 // plugin in the embedder about it.
 IPC_MESSAGE_ROUTED2(BrowserPluginMsg_ShouldAcceptTouchEvents,
                     int /* instance_id */,
@@ skipping 33 matching lines @@
                     uint64 /* surface_handle */,
                     int /* route_id */,
                     int /* gpu_host_id */)
 
 // HW accelerated surface was created in the guest, forward this
 // information to the embedder to update rendering parameters
 // in the compositor.
 IPC_MESSAGE_ROUTED2(BrowserPluginMsg_AcceleratedSurfaceNew,
                     int /* instance_id */,
                     gfx::Size /* size */)