Pass Surface ID namespace to renderer compositors.

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/memory/shared_memory.h"
 #include "base/process/process.h"
 #include "base/strings/string16.h"
@@ skipping 517 matching lines @@
   IPC_STRUCT_MEMBER(ViewMsg_Resize_Params, initial_size)
 
   // Whether to enable auto-resize.
   IPC_STRUCT_MEMBER(bool, enable_auto_resize)
 
   // The minimum size to layout the page if auto-resize is enabled.
   IPC_STRUCT_MEMBER(gfx::Size, min_size)
 
   // The maximum size to layout the page if auto-resize is enabled.
   IPC_STRUCT_MEMBER(gfx::Size, max_size)
+
+  // Namespace for the compositor to generate surface sequences.
+  IPC_STRUCT_MEMBER(uint32_t, surface_id_namespace)
 IPC_STRUCT_END()
 
 // Messages sent from the browser to the renderer.
 
 #if defined(OS_ANDROID)
 // Tells the renderer to cancel an opened date/time dialog.
 IPC_MESSAGE_ROUTED0(ViewMsg_CancelDateTimeDialog)
 
 // Replaces a date time input field.
 IPC_MESSAGE_ROUTED1(ViewMsg_ReplaceDateTime,
@@ skipping 35 matching lines @@
 
 // Tells the renderer to create a new view.
 // This message is slightly different, the view it takes (via
 // ViewMsg_New_Params) is the view to create, the message itself is sent as a
 // non-view control message.
 IPC_MESSAGE_CONTROL1(ViewMsg_New,
                      ViewMsg_New_Params)
 
 // Reply in response to ViewHostMsg_ShowView or ViewHostMsg_ShowWidget.
 // similar to the new command, but used when the renderer created a view
-// first, and we need to update it.
-IPC_MESSAGE_ROUTED0(ViewMsg_CreatingNew_ACK)
+// first, and we need to update it. |surface_id_namespace| provides a
+// namespace for the RenderWidget's compositor to use to issue surface
+// sequences.
+IPC_MESSAGE_ROUTED1(ViewMsg_CreatingNew_ACK,
+                    uint32_t /* surface_id_namespace */)
 
 // Sends updated preferences to the renderer.
 IPC_MESSAGE_ROUTED1(ViewMsg_SetRendererPrefs,
                     content::RendererPreferences)
 
 // This passes a set of webkit preferences down to the renderer.
 IPC_MESSAGE_ROUTED1(ViewMsg_UpdateWebPreferences,
                     content::WebPreferences)
 
 // Informs the renderer that the timezone has changed along with a new
@@ skipping 369 matching lines @@
 IPC_MESSAGE_ROUTED2(ViewMsg_SwapCompositorFrameAck,
                     uint32 /* output_surface_id */,
                     cc::CompositorFrameAck /* ack */)
 
 // Sent by browser to tell renderer compositor that some resources that were
 // given to the browser in a swap are not being used anymore.
 IPC_MESSAGE_ROUTED2(ViewMsg_ReclaimCompositorResources,
                     uint32 /* output_surface_id */,
                     cc::CompositorFrameAck /* ack */)
 
+// Sent by browser to give renderer compositor a new namespace ID for any
+// SurfaceSequences it has to create.
+IPC_MESSAGE_ROUTED1(ViewMsg_UpdateSurfaceIdNamespace,
+                    uint32_t /* surface_id_namespace */)
+
 IPC_MESSAGE_ROUTED0(ViewMsg_SelectWordAroundCaret)
 
 // Sent by the browser to ask the renderer to redraw.
 // If |request_id| is not zero, it is added to the forced frame's latency info
 // as ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT.
 IPC_MESSAGE_ROUTED1(ViewMsg_ForceRedraw,
                     int /* request_id */)
 
 // Sent by the browser when the renderer should generate a new frame.
 IPC_MESSAGE_ROUTED1(ViewMsg_BeginFrame,
@@ skipping 613 matching lines @@
 // cached by the OS. Please see RenderMessageFilter::OnPreCacheFontCharacters
 // for details.
 IPC_SYNC_MESSAGE_CONTROL2_0(ViewHostMsg_PreCacheFontCharacters,
                             LOGFONT /* font_data */,
                             base::string16 /* characters */)
 #endif
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent ViewMsg, then ifdefs for platform specific ViewMsg, then platform
 // independent ViewHostMsg, then ifdefs for platform specific ViewHostMsg.