Revert "Update mojo sdk to rev 8d45c89c30b230843c5bd6dd0693a555750946c0"

third_party/mojo/src/mojo/edk/embedder/embedder_internal.h

Index: third_party/mojo/src/mojo/edk/embedder/embedder_internal.h
diff --git a/third_party/mojo/src/mojo/edk/embedder/embedder_internal.h b/third_party/mojo/src/mojo/edk/embedder/embedder_internal.h
index 536e0dbe729cee53d1badb105dbdda4ec65d4e01..ab8388ae80596a22d063f78b71df68b086e9b499 100644
--- a/third_party/mojo/src/mojo/edk/embedder/embedder_internal.h
+++ b/third_party/mojo/src/mojo/edk/embedder/embedder_internal.h
@@ -19,14 +19,12 @@ class ChannelManager;
 class Core;
 
 // Repeat a typedef in mojo/edk/system/channel_manager.h, to avoid including it.
-typedef uint64_t ChannelId;
+typedef uintptr_t ChannelId;
 
 }  // namespace system
 
 namespace embedder {
 
-class PlatformSupport;
-
 // This is a type that's opaque to users of the embedder API (which only
 // gives/takes |ChannelInfo*|s). We make it a struct to make it
 // template-friendly.
@@ -39,9 +37,6 @@ struct ChannelInfo {
 
 namespace internal {
 
-// Instance of |PlatformSupport| to use.
-extern PlatformSupport* g_platform_support;
-
 // Instance of |Core| used by the system functions (|Mojo...()|).
 extern system::Core* g_core;