Metrics provider for statistical stack profiler

Provides a metrics provider that uploads statistical stack profiling
state via UMA.

This CL builds on top of the statistical profiler implementation in
https://crrev.com/1016563004, which is under review.

BUG=464929

Review URL: https://codereview.chromium.org/981143006

Cr-Commit-Position: refs/heads/master@{#321928}

2 files changed, 12 insertions, 0 deletions

diff --git a/base/profiler/stack_sampling_profiler.cc b/base/profiler/stack_sampling_profiler.cc
index 57b7b35..f760507 100644
--- a/base/profiler/stack_sampling_profiler.cc
+++ b/base/profiler/stack_sampling_profiler.cc
@@ -65,6 +65,10 @@ void PendingProfiles::GetProfiles(
 }  // namespace
 
 StackSamplingProfiler::Module::Module() : base_address(nullptr) {}
+StackSamplingProfiler::Module::Module(const void* base_address,
+                                      const std::string& id,
+                                      const FilePath& filename)
+    : base_address(base_address), id(id), filename(filename) {}
 
 StackSamplingProfiler::Module::~Module() {}
 
@@ -72,6 +76,11 @@ StackSamplingProfiler::Frame::Frame()
     : instruction_pointer(nullptr),
       module_index(-1) {}
 
+StackSamplingProfiler::Frame::Frame(const void* instruction_pointer,
+                                    int module_index)
+    : instruction_pointer(instruction_pointer),
+      module_index(module_index) {}
+
 StackSamplingProfiler::Frame::~Frame() {}
 
 StackSamplingProfiler::Profile::Profile() : preserve_sample_ordering(false) {}
diff --git a/base/profiler/stack_sampling_profiler.h b/base/profiler/stack_sampling_profiler.h
index 8d7671e..4438786 100644
--- a/base/profiler/stack_sampling_profiler.h
+++ b/base/profiler/stack_sampling_profiler.h
@@ -53,6 +53,8 @@ class BASE_EXPORT StackSamplingProfiler {
   // Module represents the module (DLL or exe) corresponding to a stack frame.
   struct BASE_EXPORT Module {
     Module();
+    Module(const void* base_address, const std::string& id,
+           const FilePath& filename);
     ~Module();
 
     // Points to the base address of the module.
@@ -72,6 +74,7 @@ class BASE_EXPORT StackSamplingProfiler {
   // Frame represents an individual sampled stack frame with module information.
   struct BASE_EXPORT Frame {
     Frame();
+    Frame(const void* instruction_pointer, int module_index);
     ~Frame();
 
     // The sampled instruction pointer within the function.