Implement an IsAllowed function in the pepper PPB_Broker_Trusted API

content/common/view_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.
 
 // IPC messages for page rendering.
 // Multiply-included message file, hence no include guard.
 
 #include "base/process.h"
 #include "base/shared_memory.h"
 #include "base/string16.h"
 #include "content/common/content_export.h"
 #include "content/common/content_param_traits.h"
 #include "content/common/edit_command.h"
 #include "content/common/navigation_gesture.h"
+#include "content/common/pepper_renderer_instance_data.h"
 #include "content/common/view_message_enums.h"
 #include "content/port/common/input_event_ack_state.h"
 #include "content/public/common/common_param_traits.h"
 #include "content/public/common/context_menu_params.h"
 #include "content/public/common/file_chooser_params.h"
 #include "content/public/common/frame_navigate_params.h"
 #include "content/public/common/javascript_message_type.h"
 #include "content/public/common/page_zoom.h"
 #include "content/public/common/referrer.h"
 #include "content/public/common/renderer_preferences.h"
@@ skipping 295 matching lines @@
   IPC_STRUCT_TRAITS_MEMBER(transition)
   IPC_STRUCT_TRAITS_MEMBER(redirects)
   IPC_STRUCT_TRAITS_MEMBER(should_update_history)
   IPC_STRUCT_TRAITS_MEMBER(searchable_form_url)
   IPC_STRUCT_TRAITS_MEMBER(searchable_form_encoding)
   IPC_STRUCT_TRAITS_MEMBER(password_form)
   IPC_STRUCT_TRAITS_MEMBER(contents_mime_type)
   IPC_STRUCT_TRAITS_MEMBER(socket_address)
 IPC_STRUCT_TRAITS_END()
 
+IPC_STRUCT_TRAITS_BEGIN(content::PepperRendererInstanceData)
+  IPC_STRUCT_TRAITS_MEMBER(render_process_id)
+  IPC_STRUCT_TRAITS_MEMBER(render_view_id)
+  IPC_STRUCT_TRAITS_MEMBER(document_url)
+  IPC_STRUCT_TRAITS_MEMBER(plugin_url)
+IPC_STRUCT_TRAITS_END()
+
 IPC_STRUCT_TRAITS_BEGIN(content::RendererPreferences)
   IPC_STRUCT_TRAITS_MEMBER(can_accept_load_drops)
   IPC_STRUCT_TRAITS_MEMBER(should_antialias_text)
   IPC_STRUCT_TRAITS_MEMBER(hinting)
   IPC_STRUCT_TRAITS_MEMBER(use_autohinter)
   IPC_STRUCT_TRAITS_MEMBER(use_bitmaps)
   IPC_STRUCT_TRAITS_MEMBER(subpixel_rendering)
   IPC_STRUCT_TRAITS_MEMBER(use_subpixel_positioning)
   IPC_STRUCT_TRAITS_MEMBER(focus_ring_color)
   IPC_STRUCT_TRAITS_MEMBER(thumb_active_color)
@@ skipping 1606 matching lines @@
 // used to identify the proper process when the renderer notifies it that the
 // plugin is hung.
 //
 // On error an empty string and null handles are returned.
 IPC_SYNC_MESSAGE_CONTROL1_2(ViewHostMsg_OpenChannelToPepperPlugin,
                             FilePath /* path */,
                             IPC::ChannelHandle /* handle to channel */,
                             int /* plugin_child_id */)
 
 // Notification that a plugin has created a new plugin instance. The parameters
-// indicate the plugin process ID that we're creating the instance for, and the
-// routing ID of the render view that the plugin instance is associated with.
-// This allows us to create a mapping in the browser process for what objects a
-// given PP_Instance is associated with.
+// indicate:
+// -The plugin process ID that we're creating the instance for.
+// -The instance ID of the instance being created.
+// -A PepperRendererInstanceData struct which contains properties from the
+// renderer which are associated with the plugin instance. This includes the
+// routing ID of the associated render view and the URL of plugin.
+// -Whether the plugin we're creating an instance for is external or internal.
 //
 // This message must be sync even though it returns no parameters to avoid
 // a race condition with the plugin process. The plugin process sends messages
 // to the browser that assume the browser knows about the instance. We need to
 // make sure that the browser actually knows about the instance before we tell
 // the plugin to run.
-IPC_SYNC_MESSAGE_CONTROL4_0(ViewHostMsg_DidCreateOutOfProcessPepperInstance,
-                            int /* plugin_child_id */,
-                            int32 /* pp_instance */,
-                            int /* view_routing_id */,
-                            bool /* is_external */)
+IPC_SYNC_MESSAGE_CONTROL4_0(
+    ViewHostMsg_DidCreateOutOfProcessPepperInstance,
+    int /* plugin_child_id */,
+    int32 /* pp_instance */,
+    content::PepperRendererInstanceData /* creation_data */,
+    bool /* is_external */)
 
 // Notification that a plugin has destroyed an instance. This is the opposite of
 // the "DidCreate" message above.
 IPC_MESSAGE_CONTROL3(ViewHostMsg_DidDeleteOutOfProcessPepperInstance,
                      int /* plugin_child_id */,
                      int32 /* pp_instance */,
                      bool /* is_external */)
 
 // A renderer sends this to the browser process when it wants to
 // create a ppapi broker.  The browser will create the broker process
@@ skipping 448 matching lines @@
                      int /* arb_robustness_status_code */)
 
 #if defined(OS_WIN)
 // Request that the given font characters be loaded by the browser so it's
 // cached by the OS. Please see RenderMessageFilter::OnPreCacheFontCharacters
 // for details.
 IPC_SYNC_MESSAGE_CONTROL2_0(ViewHostMsg_PreCacheFontCharacters,
                             LOGFONT /* font_data */,
                             string16 /* characters */)
 #endif