WebCacheManager::ClearCacheOnNavigation() is used by webrequest api, which will be moved to //extensions. So we need to resolve its the dependency on WebCacheManager by moving WebCacheManager to //components.

There are two ipc messages sent in WebCacheManger:
-ChromeViewMsg_SetCacheCapacities
-ChromeViewMsg_ClearCache

Both ipc handlers were in ChromeRenderProcessObserver. These two ipcs are renamed as WebCacheMsg_XXX, and we introduce WebCacheRenderProcessObserver and handle these ipcs in //components.

BUG=352293,411437
TBR=agl@chromium.org

Review URL: https://codereview.chromium.org/528363002

Cr-Commit-Position: refs/heads/master@{#294475}

1 files changed, 1 insertions, 0 deletions

diff --git a/ipc/ipc_message_start.h b/ipc/ipc_message_start.h
index 5acf8c1..3c28ad9 100644
--- a/ipc/ipc_message_start.h
+++ b/ipc/ipc_message_start.h
@@ -108,6 +108,7 @@ enum IPCMessageStart {
   PlatformNotificationMsgStart,
   CredentialManagerMsgStart,
   PDFMsgStart,
+  WebCacheMsgStart,
   LastIPCMsgStart  // Must come last.
 };