[tracing] Add SkResourceCache statistics to chrome://tracing (chrome side)

skia/ext/skia_memory_dump_provider.cc

Index: skia/ext/skia_memory_dump_provider.cc
diff --git a/skia/ext/skia_memory_dump_provider.cc b/skia/ext/skia_memory_dump_provider.cc
index 3944ad40fa3d48b0589678166b49796d6e93e572..1323699ddb1ef54febcb4aadfc8fc16754d77949 100644
--- a/skia/ext/skia_memory_dump_provider.cc
+++ b/skia/ext/skia_memory_dump_provider.cc
@@ -7,6 +7,7 @@
 #include "base/trace_event/memory_allocator_dump.h"
 #include "base/trace_event/memory_dump_manager.h"
 #include "base/trace_event/process_memory_dump.h"
+#include "skia/ext/SkTraceMemoryDump_chrome.h"
 #include "third_party/skia/include/core/SkGraphics.h"
 #include "third_party/skia/src/core/SkResourceCache.h"
 
@@ -25,17 +26,21 @@ SkiaMemoryDumpProvider::~SkiaMemoryDumpProvider() {}
 bool SkiaMemoryDumpProvider::OnMemoryDump(
     const base::trace_event::MemoryDumpArgs& args,
     base::trace_event::ProcessMemoryDump* process_memory_dump) {
-  auto font_mad =
-      process_memory_dump->CreateAllocatorDump("skia/sk_font_cache");
-  font_mad->AddScalar("size", "bytes", SkGraphics::GetFontCacheUsed());
-  font_mad->AddScalar("count", "objects", SkGraphics::GetFontCacheCountUsed());
-
-  auto resource_mad =
-      process_memory_dump->CreateAllocatorDump("skia/sk_resource_cache");
-  resource_mad->AddScalar("size", "bytes",
-                          SkResourceCache::GetTotalBytesUsed());
-  // TODO(ssid): crbug.com/503168. Add sub-allocation edges from discardable or
-  // malloc memory dumps to avoid double counting.
+  base::trace_event::MemoryAllocatorDump* font_mad =
+      process_memory_dump->CreateAllocatorDump("skia/sk_glyph_cache");
+  font_mad->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize,
+                      base::trace_event::MemoryAllocatorDump::kUnitsBytes,
+                      SkGraphics::GetFontCacheUsed());
+  font_mad->AddScalar(base::trace_event::MemoryAllocatorDump::kNameObjectsCount,
+                      base::trace_event::MemoryAllocatorDump::kUnitsObjects,
+                      SkGraphics::GetFontCacheCountUsed());
+
+  if (args.level_of_detail ==
+      base::trace_event::MemoryDumpArgs::LevelOfDetail::LOW)
+    return true;
+
+  SkTraceMemoryDump_Chrome skia_dumper(process_memory_dump);
+  SkGraphics::DumpMemoryStatistics(&skia_dumper);
 
   return true;
 }