Refactoring: Move some classes from content/child to platform

content/child/web_process_memory_dump_impl.cc

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "content/child/web_process_memory_dump_impl.h"
-
-#include <stddef.h>
-
-#include "base/memory/discardable_memory.h"
-#include "base/trace_event/heap_profiler_heap_dump_writer.h"
-#include "base/trace_event/process_memory_dump.h"
-#include "base/trace_event/trace_event_argument.h"
-#include "base/trace_event/trace_event_memory_overhead.h"
-#include "content/child/web_memory_allocator_dump_impl.h"
-#include "skia/ext/skia_trace_memory_dump_impl.h"
-
-namespace content {
-
-WebProcessMemoryDumpImpl::WebProcessMemoryDumpImpl()
-    : owned_process_memory_dump_(
-          new base::trace_event::ProcessMemoryDump(nullptr)),
-      process_memory_dump_(owned_process_memory_dump_.get()),
-      level_of_detail_(base::trace_event::MemoryDumpLevelOfDetail::DETAILED) {}
-
-WebProcessMemoryDumpImpl::WebProcessMemoryDumpImpl(
-    base::trace_event::MemoryDumpLevelOfDetail level_of_detail,
-    base::trace_event::ProcessMemoryDump* process_memory_dump)
-    : process_memory_dump_(process_memory_dump),
-      level_of_detail_(level_of_detail) {}
-
-WebProcessMemoryDumpImpl::~WebProcessMemoryDumpImpl() {
-}
-
-blink::WebMemoryAllocatorDump*
-WebProcessMemoryDumpImpl::createMemoryAllocatorDump(
-    const blink::WebString& absolute_name) {
-  // Get a MemoryAllocatorDump from the base/ object.
-  base::trace_event::MemoryAllocatorDump* memory_allocator_dump =
-      process_memory_dump_->CreateAllocatorDump(absolute_name.utf8());
-
-  return createWebMemoryAllocatorDump(memory_allocator_dump);
-}
-
-blink::WebMemoryAllocatorDump*
-WebProcessMemoryDumpImpl::createMemoryAllocatorDump(
-    const blink::WebString& absolute_name,
-    blink::WebMemoryAllocatorDumpGuid guid) {
-  // Get a MemoryAllocatorDump from the base/ object with given guid.
-  base::trace_event::MemoryAllocatorDump* memory_allocator_dump =
-      process_memory_dump_->CreateAllocatorDump(
-          absolute_name.utf8(),
-          base::trace_event::MemoryAllocatorDumpGuid(guid));
-  return createWebMemoryAllocatorDump(memory_allocator_dump);
-}
-
-blink::WebMemoryAllocatorDump*
-WebProcessMemoryDumpImpl::createWebMemoryAllocatorDump(
-    base::trace_event::MemoryAllocatorDump* memory_allocator_dump) {
-  if (!memory_allocator_dump)
-    return nullptr;
-
-  // Wrap it and return to blink.
-  WebMemoryAllocatorDumpImpl* web_memory_allocator_dump_impl =
-      new WebMemoryAllocatorDumpImpl(memory_allocator_dump);
-
-  // memory_allocator_dumps_ will take ownership of
-  // |web_memory_allocator_dumpd_impl|.
-  memory_allocator_dumps_.set(memory_allocator_dump,
-                              make_scoped_ptr(web_memory_allocator_dump_impl));
-  return web_memory_allocator_dump_impl;
-}
-
-blink::WebMemoryAllocatorDump* WebProcessMemoryDumpImpl::getMemoryAllocatorDump(
-    const blink::WebString& absolute_name) const {
-  // Retrieve the base MemoryAllocatorDump object and then reverse lookup
-  // its wrapper.
-  base::trace_event::MemoryAllocatorDump* memory_allocator_dump =
-      process_memory_dump_->GetAllocatorDump(absolute_name.utf8());
-  if (!memory_allocator_dump)
-    return nullptr;
-
-  // The only case of (memory_allocator_dump && !web_memory_allocator_dump)
-  // is something from blink trying to get a MAD that was created from chromium,
-  // which is an odd use case.
-  blink::WebMemoryAllocatorDump* web_memory_allocator_dump =
-      memory_allocator_dumps_.get(memory_allocator_dump);
-  DCHECK(web_memory_allocator_dump);
-  return web_memory_allocator_dump;
-}
-
-void WebProcessMemoryDumpImpl::clear() {
-  // Clear all the WebMemoryAllocatorDump wrappers.
-  memory_allocator_dumps_.clear();
-
-  // Clear the actual MemoryAllocatorDump objects from the underlying PMD.
-  process_memory_dump_->Clear();
-}
-
-void WebProcessMemoryDumpImpl::takeAllDumpsFrom(
-    blink::WebProcessMemoryDump* other) {
-  auto other_impl = static_cast<WebProcessMemoryDumpImpl*>(other);
-  // WebProcessMemoryDumpImpl is a container of WebMemoryAllocatorDump(s) which
-  // in turn are wrappers of base::trace_event::MemoryAllocatorDump(s).
-  // In order to expose the move and ownership transfer semantics of the
-  // underlying ProcessMemoryDump, we need to:
-
-  // 1) Move and transfer the ownership of the wrapped
-  // base::trace_event::MemoryAllocatorDump(s) instances.
-  process_memory_dump_->TakeAllDumpsFrom(other_impl->process_memory_dump_);
-
-  // 2) Move and transfer the ownership of the WebMemoryAllocatorDump wrappers.
-  const size_t expected_final_size = memory_allocator_dumps_.size() +
-                                     other_impl->memory_allocator_dumps_.size();
-  while (!other_impl->memory_allocator_dumps_.empty()) {
-    auto first_entry = other_impl->memory_allocator_dumps_.begin();
-    base::trace_event::MemoryAllocatorDump* memory_allocator_dump =
-        first_entry->first;
-    memory_allocator_dumps_.set(
-        memory_allocator_dump,
-        other_impl->memory_allocator_dumps_.take_and_erase(first_entry));
-  }
-  DCHECK_EQ(expected_final_size, memory_allocator_dumps_.size());
-  DCHECK(other_impl->memory_allocator_dumps_.empty());
-}
-
-void WebProcessMemoryDumpImpl::addOwnershipEdge(
-    blink::WebMemoryAllocatorDumpGuid source,
-    blink::WebMemoryAllocatorDumpGuid target,
-    int importance) {
-  process_memory_dump_->AddOwnershipEdge(
-      base::trace_event::MemoryAllocatorDumpGuid(source),
-      base::trace_event::MemoryAllocatorDumpGuid(target), importance);
-}
-
-void WebProcessMemoryDumpImpl::addOwnershipEdge(
-    blink::WebMemoryAllocatorDumpGuid source,
-    blink::WebMemoryAllocatorDumpGuid target) {
-  process_memory_dump_->AddOwnershipEdge(
-      base::trace_event::MemoryAllocatorDumpGuid(source),
-      base::trace_event::MemoryAllocatorDumpGuid(target));
-}
-
-void WebProcessMemoryDumpImpl::addSuballocation(
-    blink::WebMemoryAllocatorDumpGuid source,
-    const blink::WebString& target_node_name) {
-  process_memory_dump_->AddSuballocation(
-      base::trace_event::MemoryAllocatorDumpGuid(source),
-      target_node_name.utf8());
-}
-
-SkTraceMemoryDump* WebProcessMemoryDumpImpl::createDumpAdapterForSkia(
-    const blink::WebString& dump_name_prefix) {
-  sk_trace_dump_list_.push_back(new skia::SkiaTraceMemoryDumpImpl(
-      dump_name_prefix.utf8(), level_of_detail_, process_memory_dump_));
-  return sk_trace_dump_list_.back();
-}
-
-blink::WebMemoryAllocatorDump*
-WebProcessMemoryDumpImpl::CreateDiscardableMemoryAllocatorDump(
-    const std::string& name,
-    base::DiscardableMemory* discardable) {
-  base::trace_event::MemoryAllocatorDump* dump =
-      discardable->CreateMemoryAllocatorDump(name.c_str(),
-                                             process_memory_dump_);
-  return createWebMemoryAllocatorDump(dump);
-}
-
-void WebProcessMemoryDumpImpl::dumpHeapUsage(
-    const base::hash_map<base::trace_event::AllocationContext, size_t>&
-        bytes_by_context,
-    base::trace_event::TraceEventMemoryOverhead& overhead,
-    const char* allocator_name) {
-  scoped_refptr<base::trace_event::MemoryDumpSessionState> session_state =
-      process_memory_dump_->session_state();
-  scoped_refptr<base::trace_event::TracedValue> heap_dump = ExportHeapDump(
-      bytes_by_context,
-      session_state->stack_frame_deduplicator(),
-      session_state->type_name_deduplicator());
-  process_memory_dump_->AddHeapDump(allocator_name, heap_dump);
-  overhead.DumpInto("tracing/heap_profiler", process_memory_dump_);
-}
-
-}  // namespace content