[IPC] Remove no-longer-needed *MsgStart defines

Part of the elimination of the legacy IPC system.

Bug: 1007300
Change-Id: Ia0f3a49c09156d5a66cf8b7075c08f954d78e8ed
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1833822
Commit-Queue: Colin Blundell <blundell@chromium.org>
Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Reviewed-by: Mike West <mkwst@chromium.org>
Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
Reviewed-by: Martin Barbella <mbarbella@chromium.org>
Cr-Commit-Position: refs/heads/master@{#703630}

chrome/common/apps/platform_apps/chrome_apps_messages.h

@@ -8,8 +8,6 @@
 #include "chrome/common/apps/platform_apps/media_galleries_permission_data.h"
 #include "ipc/ipc_message_macros.h"
 
-#define IPC_MESSAGE_START ChromeAppsMsgStart
-
 IPC_STRUCT_TRAITS_BEGIN(chrome_apps::MediaGalleriesPermissionData)
   IPC_STRUCT_TRAITS_MEMBER(permission())
 IPC_STRUCT_TRAITS_END()

content/common/resource_messages.h

@@ -29,10 +29,6 @@
 
 #endif  // INTERNAL_CONTENT_COMMON_RESOURCE_MESSAGES_H_
 
-#define IPC_MESSAGE_START ResourceMsgStart
-#undef IPC_MESSAGE_EXPORT
-#define IPC_MESSAGE_EXPORT CONTENT_EXPORT
-
 IPC_ENUM_TRAITS_MAX_VALUE(blink::WebMixedContentContextType,
                           blink::WebMixedContentContextType::kLast)
 

ipc/ipc_message_start.h

@@ -24,7 +24,6 @@ enum IPCMessageStart {
   GpuChannelMsgStart,
   MediaMsgStart,
   PpapiMsgStart,
-  ResourceMsgStart,
   ChromeMsgStart,
   DragMsgStart,
   PrintMsgStart,
@@ -36,9 +35,7 @@ enum IPCMessageStart {
   ChromotingMsgStart,
   BrowserPluginMsgStart,
   AndroidWebViewMsgStart,
-  MediaPlayerMsgStart,
   PeerConnectionTrackerMsgStart,
-  WebRtcLoggingMsgStart,
   NaClHostMsgStart,
   EncryptedMediaMsgStart,
   CastMsgStart,
@@ -48,7 +45,6 @@ enum IPCMessageStart {
   WebTestMsgStart,
   NetworkHintsMsgStart,
   CastMediaMsgStart,
-  SyncCompositorMsgStart,
   ExtensionsGuestViewMsgStart,
   GuestViewMsgStart,
   // Note: CastCryptoMsgStart and CastChannelMsgStart reserved for Chromecast
@@ -60,7 +56,6 @@ enum IPCMessageStart {
   SurfaceViewManagerMsgStart,
   ExtensionWorkerMsgStart,
   SubresourceFilterMsgStart,
-  ChromeAppsMsgStart,
   UnfreezableFrameMsgStart,
   LastIPCMsgStart  // Must come last.
 };

tools/ipc_fuzzer/message_tools/message_list.cc

@@ -54,9 +54,7 @@ static bool check_msgtable() {
   exemptions.push_back(CastMediaMsgStart);    // Reserved for chromecast.
   exemptions.push_back(IPCTestMsgStart);
   exemptions.push_back(WorkerMsgStart);    // Now only used by tests.
-  exemptions.push_back(ResourceMsgStart);  // Cleanup underway.
   exemptions.push_back(ChromeUtilityPrintingMsgStart);  // BUILDFLAGS, sigh.
-  exemptions.push_back(WebRtcLoggingMsgStart);
 
 #if !BUILDFLAG(ENABLE_NACL)
   exemptions.push_back(NaClMsgStart);
@@ -64,11 +62,9 @@ static bool check_msgtable() {
 
 
 #if !defined(OS_ANDROID)
-  exemptions.push_back(MediaPlayerMsgStart);
   exemptions.push_back(EncryptedMediaMsgStart);
   exemptions.push_back(GinJavaBridgeMsgStart);
   exemptions.push_back(AndroidWebViewMsgStart);
-  exemptions.push_back(SyncCompositorMsgStart);
   exemptions.push_back(ExtensionWorkerMsgStart);
   exemptions.push_back(SurfaceViewManagerMsgStart);
 #endif  // !defined(OS_ANDROID)