Rename fUniqueID -> fMessageBoxID

Change-Id: I8f3630236b799ebdf203a83972fe245b2f073472
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292680
Commit-Queue: Herb Derby <herb@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
diff --git a/src/gpu/text/GrTextBlobCache.cpp b/src/gpu/text/GrTextBlobCache.cpp
index 619bb4f..b6be2f9 100644
--- a/src/gpu/text/GrTextBlobCache.cpp
+++ b/src/gpu/text/GrTextBlobCache.cpp
@@ -15,11 +15,11 @@
     return msg.fContextID == msgBusUniqueID;
 }
 
-GrTextBlobCache::GrTextBlobCache(PurgeMore purgeMore, uint32_t uniqueID)
+GrTextBlobCache::GrTextBlobCache(PurgeMore purgeMore, uint32_t messageBusID)
         : fPurgeMore(purgeMore)
         , fSizeBudget(kDefaultBudget)
-        , fUniqueID(uniqueID)
-        , fPurgeBlobInbox(uniqueID) { }
+        , fMessageBusID(messageBusID)
+        , fPurgeBlobInbox(messageBusID) { }
 
 GrTextBlobCache::~GrTextBlobCache() {
     this->freeAll();
@@ -32,7 +32,7 @@
     sk_sp<GrTextBlob> cacheBlob(GrTextBlob::Make(glyphRunList, viewMatrix, color, forceW));
     cacheBlob->setupKey(key, blurRec, glyphRunList.paint());
     this->add(cacheBlob);
-    glyphRunList.temporaryShuntBlobNotifyAddedToCache(fUniqueID);
+    glyphRunList.temporaryShuntBlobNotifyAddedToCache(fMessageBusID);
     return cacheBlob;
 }