Remove scoped trackers from OnAllocateLockedDiscardableSharedMemory.

After the method was moved off the IO thread, the scoped trackers were no
longer relevant.

BUG=466405

Review URL: https://codereview.chromium.org/1060173002

Cr-Commit-Position: refs/heads/master@{#323987}

content/common/host_discardable_shared_memory_manager.cc

@@ -13,7 +13,6 @@
 #include "base/lazy_instance.h"
 #include "base/memory/discardable_memory.h"
 #include "base/numerics/safe_math.h"
-#include "base/profiler/scoped_tracker.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/sys_info.h"
 #include "base/trace_event/trace_event.h"
@@ -190,11 +189,6 @@ void HostDiscardableSharedMemoryManager::AllocateLockedDiscardableSharedMemory(
     size_t size,
     DiscardableSharedMemoryId id,
     base::SharedMemoryHandle* shared_memory_handle) {
-  // TODO(erikchen): Remove ScopedTracker below once http://crbug.com/466405
-  // is fixed.
-  tracked_objects::ScopedTracker tracking_profile1(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "466405 AllocateLockedDiscardableSharedMemory::Start"));
   base::AutoLock lock(lock_);
 
   // Make sure |id| is not already in use.
@@ -216,19 +210,9 @@ void HostDiscardableSharedMemoryManager::AllocateLockedDiscardableSharedMemory(
   if (size < memory_limit_)
     limit = memory_limit_ - size;
 
-  // TODO(erikchen): Remove ScopedTracker below once http://crbug.com/466405
-  // is fixed.
-  tracked_objects::ScopedTracker tracking_profile2(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "466405 AllocateLockedDiscardableSharedMemory::ReduceMemoryUsage"));
   if (bytes_allocated_ > limit)
     ReduceMemoryUsageUntilWithinLimit(limit);
 
-  // TODO(erikchen): Remove ScopedTracker below once http://crbug.com/466405
-  // is fixed.
-  tracked_objects::ScopedTracker tracking_profile3(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "466405 AllocateLockedDiscardableSharedMemory::NewMemory"));
   scoped_ptr<base::DiscardableSharedMemory> memory(
       new base::DiscardableSharedMemory);
   if (!memory->CreateAndMap(size)) {
@@ -236,11 +220,6 @@ void HostDiscardableSharedMemoryManager::AllocateLockedDiscardableSharedMemory(
     return;
   }
 
-  // TODO(erikchen): Remove ScopedTracker below once http://crbug.com/466405
-  // is fixed.
-  tracked_objects::ScopedTracker tracking_profile4(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "466405 AllocateLockedDiscardableSharedMemory::ShareToProcess"));
   if (!memory->ShareToProcess(process_handle, shared_memory_handle)) {
     LOG(ERROR) << "Cannot share discardable memory segment";
     *shared_memory_handle = base::SharedMemory::NULLHandle();
@@ -254,12 +233,6 @@ void HostDiscardableSharedMemoryManager::AllocateLockedDiscardableSharedMemory(
     return;
   }
 
-  // TODO(erikchen): Remove ScopedTracker below once http://crbug.com/466405
-  // is fixed.
-  tracked_objects::ScopedTracker tracking_profile5(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "466405 "
-          "AllocateLockedDiscardableSharedMemory::BytesAllocatedChanged"));
   bytes_allocated_ = checked_bytes_allocated.ValueOrDie();
   BytesAllocatedChanged(bytes_allocated_);
 
@@ -268,13 +241,6 @@ void HostDiscardableSharedMemoryManager::AllocateLockedDiscardableSharedMemory(
   segments_.push_back(segment.get());
   std::push_heap(segments_.begin(), segments_.end(), CompareMemoryUsageTime);
 
-  // TODO(erikchen): Remove ScopedTracker below once http://crbug.com/466405
-  // is fixed.
-  tracked_objects::ScopedTracker tracking_profile6(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "466405 "
-          "AllocateLockedDiscardableSharedMemory::"
-          "ScheduleEnforceMemoryPolicy"));
   if (bytes_allocated_ > memory_limit_)
     ScheduleEnforceMemoryPolicy();
 }