Combine ViewHostMsg_{Paint,Scroll}Rect into one IPC....

chrome/common/render_messages_internal.h

 // Copyright (c) 2009 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.
 
 // This header is meant to be included in multiple passes, hence no traditional
 // header guard.
 // See ipc_message_macros.h for explanation of the macros and passes.
 
 #include <map>
 #include <string>
@@ skipping 110 matching lines @@
   // is true.  In that case, the generated ViewHostMsg_PaintRect message will
   // have the IS_RESTORE_ACK flag set.  If needs_repainting is false, then this
   // message does not trigger a message in response.
   IPC_MESSAGE_ROUTED1(ViewMsg_WasRestored,
                       bool /* needs_repainting */)
 
   // Tells the render view to capture a thumbnail image of the page. The
   // render view responds with a ViewHostMsg_Thumbnail.
   IPC_MESSAGE_ROUTED0(ViewMsg_CaptureThumbnail)
 
-  // Tells the render view that a ViewHostMsg_PaintRect message was processed.
-  // This signals the render view that it can send another PaintRect message.
-  IPC_MESSAGE_ROUTED0(ViewMsg_PaintRect_ACK)
-
   // Tells the render view to switch the CSS to print media type, renders every
   // requested pages and switch back the CSS to display media type.
   IPC_MESSAGE_ROUTED0(ViewMsg_PrintPages)
 
   // Tells the render view that printing is done so it can clean up.
   IPC_MESSAGE_ROUTED2(ViewMsg_PrintingDone,
                       int /* document_cookie */,
                       bool /* success */)
 
   // Tells the renderer to dump as much memory as it can, perhaps because we
   // have memory pressure or the renderer is (or will be) paged out.  This
   // should only result in purging objects we can recalculate, e.g. caches or
   // JS garbage, not in purging irreplaceable objects.
   IPC_MESSAGE_CONTROL0(ViewMsg_PurgeMemory)
 
-  // Tells the render view that a ViewHostMsg_ScrollRect message was processed.
-  // This signals the render view that it can send another ScrollRect message.
-  IPC_MESSAGE_ROUTED0(ViewMsg_ScrollRect_ACK)
+  // Tells the render view that a ViewHostMsg_UpdateRect message was processed.
+  // This signals the render view that it can send another UpdateRect message.
+  IPC_MESSAGE_ROUTED0(ViewMsg_UpdateRect_ACK)
 
   // Message payload includes:
   // 1. A blob that should be cast to WebInputEvent
   // 2. An optional boolean value indicating if a RawKeyDown event is associated
   //    to a keyboard shortcut of the browser.
   IPC_MESSAGE_ROUTED0(ViewMsg_HandleInputEvent)
 
   // This message notifies the renderer that the next key event is bound to one
   // or more pre-defined edit commands. If the next key event is not handled
   // by webkit, the specified edit commands shall be executed against current
@@ skipping 823 matching lines @@
 
   // Sent when the renderer fails a provisional load with an error.
   IPC_MESSAGE_ROUTED4(ViewHostMsg_DidFailProvisionalLoadWithError,
                       bool /* true if it is the main frame */,
                       int /* error_code */,
                       GURL /* url */,
                       bool /* true if the failure is the result of
                               navigating to a POST again and we're going to
                               show the POST interstitial */ )
 
-  // Sent to paint part of the view.  In response to this message, the host
-  // generates a ViewMsg_PaintRect_ACK message.
-  IPC_MESSAGE_ROUTED1(ViewHostMsg_PaintRect,
-                      ViewHostMsg_PaintRect_Params)
-
-  // Sent to scroll part of the view.  In response to this message, the host
-  // generates a ViewMsg_ScrollRect_ACK message.
-  IPC_MESSAGE_ROUTED1(ViewHostMsg_ScrollRect,
-                      ViewHostMsg_ScrollRect_Params)
+  // Sent to update part of the view.  In response to this message, the host
+  // generates a ViewMsg_UpdateRect_ACK message.
+  IPC_MESSAGE_ROUTED1(ViewHostMsg_UpdateRect,
+                      ViewHostMsg_UpdateRect_Params)
 
   // Acknowledges receipt of a ViewMsg_HandleInputEvent message.
   // Payload is a WebInputEvent::Type which is the type of the event, followed
   // by an optional WebInputEvent which is provided only if the event was not
   // processed.
   IPC_MESSAGE_ROUTED0(ViewHostMsg_HandleInputEvent_ACK)
 
   IPC_MESSAGE_ROUTED0(ViewHostMsg_Focus)
   IPC_MESSAGE_ROUTED0(ViewHostMsg_Blur)
   IPC_MESSAGE_ROUTED0(ViewHostMsg_FocusedNodeChanged)
@@ skipping 988 matching lines @@
                               string16 /* word */,
                               int /* document tag */,
                               bool /* correct */)
 
   IPC_SYNC_MESSAGE_CONTROL1_1(
       ViewHostMsg_SpellChecker_PlatformFillSuggestionList,
       string16 /* word */,
       std::vector<string16> /* suggestions */)
 
 IPC_END_MESSAGES(ViewHost)