Add support for light dumps in SkTraceMemoryDump interface.

src/core/SkGlyphCache.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkGlyphCache.h"
 #include "SkGlyphCache_Globals.h"
 #include "SkGraphics.h"
@@ skipping 433 matching lines @@
 
 void SkGlyphCache::DumpMemoryStatistics(SkTraceMemoryDump* dump) {
     dump->dumpNumericValue(gGlyphCacheDumpName, "size", "bytes", SkGraphics::GetFontCacheUsed());
     dump->dumpNumericValue(gGlyphCacheDumpName, "budget_size", "bytes",
                            SkGraphics::GetFontCacheLimit());
     dump->dumpNumericValue(gGlyphCacheDumpName, "glyph_count", "objects",
                            SkGraphics::GetFontCacheCountUsed());
     dump->dumpNumericValue(gGlyphCacheDumpName, "budget_glyph_count", "objects",
                            SkGraphics::GetFontCacheCountLimit());
 
+    if (dump->isLightDump()) {
+      dump->setMemoryBacking(gGlyphCacheDumpName, "malloc", nullptr);
+      return;
+    }
+
     int counter = 0;
     SkGlyphCacheDumpContext context = { &counter, dump };
     SkGlyphCache::VisitAll(sk_trace_dump_visitor, &context);
 }
 
 void SkGlyphCache::VisitAll(Visitor visitor, void* context) {
     SkGlyphCache_Globals& globals = get_globals();
     AutoAcquire           ac(globals.fLock);
     SkGlyphCache*         cache;
 
@@ skipping 174 matching lines @@
 }
 
 void SkGraphics::PurgeFontCache() {
     get_globals().purgeAll();
     SkTypefaceCache::PurgeAll();
 }
 
 // TODO(herb): clean up TLS apis.
 size_t SkGraphics::GetTLSFontCacheLimit() { return 0; }
 void SkGraphics::SetTLSFontCacheLimit(size_t bytes) { }