Stack sampling profiler: set process and thread information

components/metrics/call_stack_profile_collector.h

Index: components/metrics/call_stack_profile_collector.h
diff --git a/components/metrics/call_stack_profile_collector.h b/components/metrics/call_stack_profile_collector.h
index cfae8c8f9e05351a09e877029141faf18305c52b..f6a2ca1ce53925053a1e89ccbb4fb29cefa3486a 100644
--- a/components/metrics/call_stack_profile_collector.h
+++ b/components/metrics/call_stack_profile_collector.h
@@ -14,10 +14,13 @@ class CallStackProfileCollector : public mojom::CallStackProfileCollector {
  public:
   using CallStackProfile = base::StackSamplingProfiler::CallStackProfile;
 
-  CallStackProfileCollector();
+  explicit CallStackProfileCollector(
+      CallStackProfileParams::Process expected_process);
   ~CallStackProfileCollector() override;
 
-  static void Create(mojom::CallStackProfileCollectorRequest request);
+  // Create a collector to receive profiles from |expected_process|.
+  static void Create(CallStackProfileParams::Process expected_process,
+                     mojom::CallStackProfileCollectorRequest request);
 
   // mojom::CallStackProfileCollector:
   void Collect(const CallStackProfileParams& params,
@@ -25,6 +28,11 @@ class CallStackProfileCollector : public mojom::CallStackProfileCollector {
                const std::vector<CallStackProfile>& profiles) override;
 
  private:
+  // Profile params are validated to come from this process. Profiles with a
+  // different process declared in the params are considered untrustworthy and
+  // ignored.
+  const CallStackProfileParams::Process expected_process_;
+
   DISALLOW_COPY_AND_ASSIGN(CallStackProfileCollector);
 };