Add GlyphMetricsMap memory consumption to memory-infra tracing

third_party/WebKit/Source/platform/fonts/FontDataCache.cpp

Index: third_party/WebKit/Source/platform/fonts/FontDataCache.cpp
diff --git a/third_party/WebKit/Source/platform/fonts/FontDataCache.cpp b/third_party/WebKit/Source/platform/fonts/FontDataCache.cpp
index 27a18526f0e478cdbdd879ea296dc966a7e2cfec..9a6443da44407347b90b25f3d721d6430fb007ae 100644
--- a/third_party/WebKit/Source/platform/fonts/FontDataCache.cpp
+++ b/third_party/WebKit/Source/platform/fonts/FontDataCache.cpp
@@ -30,6 +30,7 @@
 
 #include "platform/fonts/FontDataCache.h"
 
+#include "base/trace_event/process_memory_dump.h"
 #include "platform/fonts/SimpleFontData.h"
 
 using namespace WTF;
@@ -160,4 +161,19 @@ bool FontDataCache::purgeLeastRecentlyUsed(int count)
     return didWork;
 }
 
+void FontDataCache::dumpCountAndGlyphToBoundsMaps(base::trace_event::ProcessMemoryDump* memoryDump)
+{
+    base::trace_event::MemoryAllocatorDump* dump = memoryDump->CreateAllocatorDump("font_caches/font_data_cache");
+    dump->AddScalar("objects_in_cache", "count", m_cache.size());
+    dump->AddScalar("inactive_objects", "count", m_inactiveFontData.size());
+
+    size_t glyphToBoundsMapTotalSize = 0;
+    for (auto entry : m_cache) {
+        glyphToBoundsMapTotalSize += entry.value.first->glyphToBoundsMapMemorySize();
+    }
+    dump->AddScalar("glyphtoboundsmaps_total_size", "bytes", glyphToBoundsMapTotalSize);
+
+    memoryDump->AddSuballocation(dump->guid(), WTF::Partitions::kAllocatedObjectPoolName);
+}
+
 } // namespace blink