Introducing phased profiling framework

content/common/child_process_messages.h

 // Copyright (c) 2012 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.
 
 // Common IPC messages used for child processes.
 // Multiply-included message file, hence no include guard.
 
 #include <string>
 #include <vector>
 
@@ skipping 33 matching lines @@
   IPC_STRUCT_TRAITS_MEMBER(birth)
   IPC_STRUCT_TRAITS_MEMBER(death_data)
   IPC_STRUCT_TRAITS_MEMBER(death_thread_name)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(tracked_objects::ParentChildPairSnapshot)
   IPC_STRUCT_TRAITS_MEMBER(parent)
   IPC_STRUCT_TRAITS_MEMBER(child)
 IPC_STRUCT_TRAITS_END()
 
-IPC_STRUCT_TRAITS_BEGIN(tracked_objects::ProcessDataSnapshot)
+IPC_STRUCT_TRAITS_BEGIN(tracked_objects::ProcessDataPhaseSnapshot)
   IPC_STRUCT_TRAITS_MEMBER(tasks)
   IPC_STRUCT_TRAITS_MEMBER(descendants)
+IPC_STRUCT_TRAITS_END()
+
+IPC_STRUCT_TRAITS_BEGIN(tracked_objects::ProcessDataSnapshot)
+  IPC_STRUCT_TRAITS_MEMBER(phased_process_data_snapshots)
   IPC_STRUCT_TRAITS_MEMBER(process_id)
 IPC_STRUCT_TRAITS_END()
 
 IPC_ENUM_TRAITS_MAX_VALUE(gfx::GpuMemoryBufferType,
                           gfx::GPU_MEMORY_BUFFER_TYPE_LAST)
 
 IPC_STRUCT_TRAITS_BEGIN(gfx::GpuMemoryBufferHandle)
   IPC_STRUCT_TRAITS_MEMBER(id)
   IPC_STRUCT_TRAITS_MEMBER(type)
   IPC_STRUCT_TRAITS_MEMBER(handle)
@@ skipping 49 matching lines @@
 // Sent to child process to request tcmalloc stats.
 IPC_MESSAGE_CONTROL0(ChildProcessMsg_GetTcmallocStats)
 #endif
 
 ////////////////////////////////////////////////////////////////////////////////
 // Messages sent from the child process to the browser.
 
 IPC_MESSAGE_CONTROL0(ChildProcessHostMsg_ShutdownRequest)
 
 // Send back profiler data (ThreadData in tracked_objects).
-IPC_MESSAGE_CONTROL2(ChildProcessHostMsg_ChildProfilerData,
-                     int, /* sequence_number */
-                     tracked_objects::ProcessDataSnapshot /* profiler_data */)
+IPC_MESSAGE_CONTROL2(
+    ChildProcessHostMsg_ChildProfilerData,
+    int, /* sequence_number */
+    tracked_objects::ProcessDataSnapshot /* process_data_snapshot */)
 
 // Send back histograms as vector of pickled-histogram strings.
 IPC_MESSAGE_CONTROL2(ChildProcessHostMsg_ChildHistogramData,
                      int, /* sequence_number */
                      std::vector<std::string> /* histogram_data */)
 
 // Request a histogram from the browser. The browser will send the histogram
 // data only if it has been passed the command line flag
 // switches::kDomAutomationController.
 IPC_SYNC_MESSAGE_CONTROL1_1(ChildProcessHostMsg_GetBrowserHistogram,
@@ skipping 54 matching lines @@
 IPC_MESSAGE_CONTROL2(ChildProcessHostMsg_DeletedGpuMemoryBuffer,
                      gfx::GpuMemoryBufferId,
                      uint32 /* sync_point */)
 
 // Asks the browser to create a block of discardable shared memory for the
 // child process.
 IPC_SYNC_MESSAGE_CONTROL1_1(
     ChildProcessHostMsg_SyncAllocateLockedDiscardableSharedMemory,
     uint32 /* size */,
     base::SharedMemoryHandle)