GrAuditTrail hooks in GrContext + GrDrawContext

TBR=bsalomon@google.com
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1580023002

Review URL: https://codereview.chromium.org/1580023002
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index c37f31c..e920144 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -240,6 +240,7 @@
     RETURN_FALSE_IF_ABANDONED
     ASSERT_OWNED_RESOURCE(surface);
     SkASSERT(surface);
+    GR_AUDIT_TRAIL_AUTO_FRAME(&fAuditTrail, "GrContext::writeSurfacePixels");
 
     this->testPMConversionsIfNecessary(pixelOpsFlags);
 
@@ -379,6 +380,7 @@
     RETURN_FALSE_IF_ABANDONED
     ASSERT_OWNED_RESOURCE(src);
     SkASSERT(src);
+    GR_AUDIT_TRAIL_AUTO_FRAME(&fAuditTrail, "GrContext::readSurfacePixels");
 
     this->testPMConversionsIfNecessary(flags);
     SkAutoMutexAcquire ama(fReadPixelsMutex);
@@ -520,6 +522,8 @@
                             const SkIPoint& dstPoint, uint32_t pixelOpsFlags) {
     ASSERT_SINGLE_OWNER
     RETURN_IF_ABANDONED
+    GR_AUDIT_TRAIL_AUTO_FRAME(&fAuditTrail, "GrContext::copySurface");
+
     if (!src || !dst) {
         return;
     }