Add Web Resources usage to chrome://tracing.

third_party/WebKit/Source/core/fetch/ScriptResource.cpp

Index: third_party/WebKit/Source/core/fetch/ScriptResource.cpp
diff --git a/third_party/WebKit/Source/core/fetch/ScriptResource.cpp b/third_party/WebKit/Source/core/fetch/ScriptResource.cpp
index 50935706761b2a9ed2ec6e79fe6cfd3d62aa4e04..b6bd636de33ebdcb8e8af408418636e987b11ab0 100644
--- a/third_party/WebKit/Source/core/fetch/ScriptResource.cpp
+++ b/third_party/WebKit/Source/core/fetch/ScriptResource.cpp
@@ -33,6 +33,7 @@
 #include "platform/MIMETypeRegistry.h"
 #include "platform/SharedBuffer.h"
 #include "platform/network/HTTPParsers.h"
+#include "public/platform/WebProcessMemoryDump.h"
 
 namespace blink {
 
@@ -72,6 +73,15 @@ void ScriptResource::appendData(const char* data, unsigned length)
         client->notifyAppendData(this);
 }
 
+void ScriptResource::onMemoryDump(WebProcessMemoryDump* memoryDump) const
+{
+    Resource::onMemoryDump(memoryDump);
+    const String name = getMemoryDumpName() + "/decoded_script";
+    auto dump = memoryDump->createMemoryAllocatorDump(name);
+    dump->AddScalar("size", "bytes", m_script.string().sizeInBytes());
+    memoryDump->AddSuballocation(dump->guid(), String(WTF::Partitions::kAllocatedObjectPoolName));
+}
+
 AtomicString ScriptResource::mimeType() const
 {
     return extractMIMETypeFromMediaType(m_response.httpHeaderField("Content-Type")).lower();