Track GL buffer state based on unique resource ID

Reworks GrGLGpu to track GL buffer state based on the unique
GrGpuResource ID. This eliminates the need to notify the gpu object
whenever a buffer is deleted.

This change also allows us to remove the type specifier from GrBuffer.
At this point a buffer is just a chunk of memory, and the type
given at creation time is just a suggestion to the GL backend about
which target to bind to for updates.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1854283004

Committed: https://skia.googlesource.com/skia/+/deacc97bc63513b5eacaf21f858727f6e8b98ce5

Review URL: https://codereview.chromium.org/1854283004
diff --git a/include/gpu/GrTypesPriv.h b/include/gpu/GrTypesPriv.h
index bf8ea49..39386f0 100644
--- a/include/gpu/GrTypesPriv.h
+++ b/include/gpu/GrTypesPriv.h
@@ -406,11 +406,22 @@
 enum GrBufferType {
     kVertex_GrBufferType,
     kIndex_GrBufferType,
+    kTexel_GrBufferType,
+    kDrawIndirect_GrBufferType,
     kXferCpuToGpu_GrBufferType,
     kXferGpuToCpu_GrBufferType,
 
     kLast_GrBufferType = kXferGpuToCpu_GrBufferType
 };
+static const int kGrBufferTypeCount = kLast_GrBufferType + 1;
+
+static inline bool GrBufferTypeIsVertexOrIndex(GrBufferType type) {
+    SkASSERT(type >= 0 && type < kGrBufferTypeCount);
+    return type <= kIndex_GrBufferType;
+
+    GR_STATIC_ASSERT(0 == kVertex_GrBufferType);
+    GR_STATIC_ASSERT(1 == kIndex_GrBufferType);
+}
 
 /**
 * Provides a performance hint regarding the frequency at which a data store will be accessed.