Reland "Make GPU cache invalidation SkMessageBus messages go to one GrContext."

This is a reland of f4c5bb9aba485aa47c27b15905d81992b7cf4707

Original change's description:
> Make GPU cache invalidation SkMessageBus messages go to one GrContext.
> 
> Makes it so the template param to SkMessageBus must implement:
> bool shouldSend(uint32_t inboxID) const
> 
> Updates all GPU backend message types to only go to the GrContext that
> is adding a cache entry.
> 
> Bug: skia:
> Change-Id: I3e8a4eb90654b7b8ac57cac9fb508c0ef1d51058
> Reviewed-on: https://skia-review.googlesource.com/140220
> Reviewed-by: Robert Phillips <robertphillips@google.com>
> Reviewed-by: Jim Van Verth <jvanverth@google.com>

Bug: skia:
Change-Id: I8402bfe3ed0170c99936d47050458817030b473b
Reviewed-on: https://skia-review.googlesource.com/140801
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/gpu/GrResourceCache.h b/src/gpu/GrResourceCache.h
index 771b13fb26..507c192f43 100644
--- a/src/gpu/GrResourceCache.h
+++ b/src/gpu/GrResourceCache.h
@@ -27,6 +27,10 @@ class SkTraceMemoryDump;
 struct GrGpuResourceFreedMessage {
     GrGpuResource* fResource;
     uint32_t fOwningUniqueID;
+    bool shouldSend(uint32_t inboxID) const {
+        // The inbox's ID is the unique ID of the owning GrContext.
+        return inboxID == fOwningUniqueID;
+    }
 };
 
 /**
@@ -67,6 +71,9 @@ public:
     class ResourceAccess;
     ResourceAccess resourceAccess();
 
+    /** Unique ID of the owning GrContext. */
+    uint32_t contextUniqueID() const { return fContextUniqueID; }
+
     /**
      * Sets the cache limits in terms of number of resources, max gpu memory byte size, and number
      * of external GrContext flushes that a resource can be unused before it is evicted. The latter