Add process start time and CPU time columns to task manager

chrome/browser/task_manager/sampling/shared_sampler_win.cc

Index: chrome/browser/task_manager/sampling/shared_sampler_win.cc
diff --git a/chrome/browser/task_manager/sampling/shared_sampler_win.cc b/chrome/browser/task_manager/sampling/shared_sampler_win.cc
index f87e71505f90a01957d12fc0c169061610bb7e58..277b909a4c692a5f47b8a02d4621e4f869d8821f 100644
--- a/chrome/browser/task_manager/sampling/shared_sampler_win.cc
+++ b/chrome/browser/task_manager/sampling/shared_sampler_win.cc
@@ -10,6 +10,7 @@
 #include <algorithm>
 
 #include "base/bind.h"
+#include "base/bit_cast.h"
 #include "base/command_line.h"
 #include "base/path_service.h"
 #include "base/time/time.h"
@@ -220,6 +221,8 @@ struct ProcessData {
   ProcessData(ProcessData&&) = default;
 
   int64_t physical_bytes;
+  base::Time start_time;
+  base::TimeDelta cpu_time;
   std::vector<ThreadData> threads;
 
  private:
@@ -284,6 +287,17 @@ const ProcessData* SeekInPreviousSnapshot(
   return nullptr;
 }
 
+// A wrapper function converting ticks (in units of 100 ns) to Time.
+base::Time ConvertTicksToTime(uint64_t ticks) {
+  FILETIME ft = bit_cast<FILETIME, uint64_t>(ticks);
+  return base::Time::FromFileTime(ft);
+}
+
+// A wrapper function converting ticks (in units of 100 ns) to TimeDelta.
+base::TimeDelta ConvertTicksToTimeDelta(uint64_t ticks) {
+  return base::TimeDelta::FromMicroseconds(ticks / 10);
+}
+
 }  // namespace
 
 // ProcessDataSnapshot gets created and accessed only on the worker thread.
@@ -313,7 +327,8 @@ SharedSampler::SharedSampler(
 SharedSampler::~SharedSampler() {}
 
 int64_t SharedSampler::GetSupportedFlags() const {
-  return REFRESH_TYPE_IDLE_WAKEUPS | REFRESH_TYPE_PHYSICAL_MEMORY;
+  return REFRESH_TYPE_IDLE_WAKEUPS | REFRESH_TYPE_PHYSICAL_MEMORY |
+         REFRESH_TYPE_START_TIME | REFRESH_TYPE_CPU_TIME;
 }
 
 SharedSampler::Callbacks::Callbacks() {}
@@ -323,12 +338,16 @@ SharedSampler::Callbacks::~Callbacks() {}
 SharedSampler::Callbacks::Callbacks(Callbacks&& other) {
   on_idle_wakeups = std::move(other.on_idle_wakeups);
   on_physical_memory = std::move(other.on_physical_memory);
+  on_start_time = std::move(other.on_start_time);
+  on_cpu_time = std::move(other.on_cpu_time);
 }
 
 void SharedSampler::RegisterCallbacks(
     base::ProcessId process_id,
     const OnIdleWakeupsCallback& on_idle_wakeups,
-    const OnPhysicalMemoryCallback& on_physical_memory) {
+    const OnPhysicalMemoryCallback& on_physical_memory,
+    const OnStartTimeCallback& on_start_time,
+    const OnCpuTimeCallback& on_cpu_time) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
   if (process_id == 0)
@@ -337,6 +356,8 @@ void SharedSampler::RegisterCallbacks(
   Callbacks callbacks;
   callbacks.on_idle_wakeups = on_idle_wakeups;
   callbacks.on_physical_memory = on_physical_memory;
+  callbacks.on_start_time = on_start_time;
+  callbacks.on_cpu_time = on_cpu_time;
   bool result = callbacks_map_.insert(
       std::make_pair(process_id, std::move(callbacks))).second;
   DCHECK(result);
@@ -493,6 +514,11 @@ std::unique_ptr<ProcessDataSnapshot> SharedSampler::CaptureSnapshot() {
         process_data.physical_bytes =
             static_cast<int64_t>(pi->WorkingSetPrivateSize);
 
+        process_data.start_time = ConvertTicksToTime(pi->CreateTime);
+
+        process_data.cpu_time =
+            ConvertTicksToTimeDelta(pi->KernelTime + pi->UserTime);
+
         // Iterate over threads and store each thread's ID and number of context
         // switches.
         for (ULONG thread_index = 0; thread_index < pi->NumberOfThreads;
@@ -570,6 +596,8 @@ void SharedSampler::MakeResultsFromTwoSnapshots(
     result.idle_wakeups_per_second =
         static_cast<int>(round(idle_wakeups_delta / time_delta));
     result.physical_bytes = process.physical_bytes;
+    result.start_time = process.start_time;
+    result.cpu_time = process.cpu_time;
     results->push_back(result);
   }
 }
@@ -583,6 +611,8 @@ void SharedSampler::MakeResultsFromSnapshot(const ProcessDataSnapshot& snapshot,
     // ProcessMetrics::CalculateIdleWakeupsPerSecond implementation.
     result.idle_wakeups_per_second = 0;
     result.physical_bytes = pair.second.physical_bytes;
+    result.start_time = pair.second.start_time;
+    result.cpu_time = pair.second.cpu_time;
     results->push_back(result);
   }
 }
@@ -597,9 +627,11 @@ void SharedSampler::OnRefreshDone(
   for (const auto& callback_entry : callbacks_map_) {
     base::ProcessId process_id = callback_entry.first;
     // A sentinel value of -1 is used when the result isn't available.
-    // Task manager will use this to display 'N/A'.
+    // Task manager will use this to display '-'.
     int idle_wakeups_per_second = -1;
     int64_t physical_bytes = -1;
+    base::Time start_time;
+    base::TimeDelta cpu_time;
 
     // Match refresh result by |process_id|.
     // This relies on refresh results being ordered by Process ID.
@@ -614,6 +646,8 @@ void SharedSampler::OnRefreshDone(
         // Data matched in |refresh_results|.
         idle_wakeups_per_second = result.idle_wakeups_per_second;
         physical_bytes = result.physical_bytes;
+        start_time = result.start_time;
+        cpu_time = result.cpu_time;
         ++result_index;
         break;
       }
@@ -635,6 +669,18 @@ void SharedSampler::OnRefreshDone(
       DCHECK(callback_entry.second.on_physical_memory);
       callback_entry.second.on_physical_memory.Run(physical_bytes);
     }
+
+    if (TaskManagerObserver::IsResourceRefreshEnabled(REFRESH_TYPE_START_TIME,
+                                                      refresh_flags_)) {
+      DCHECK(callback_entry.second.on_start_time);
+      callback_entry.second.on_start_time.Run(start_time);
+    }
+
+    if (TaskManagerObserver::IsResourceRefreshEnabled(REFRESH_TYPE_CPU_TIME,
+                                                      refresh_flags_)) {
+      DCHECK(callback_entry.second.on_cpu_time);
+      callback_entry.second.on_cpu_time.Run(cpu_time);
+    }
   }
 
   // Reset refresh_results_ to trigger RefreshOnWorkerThread next time Refresh