1 files changed, 2 insertions, 35 deletions

diff --git a/chromium/base/profiler/thread_delegate.h b/chromium/base/profiler/thread_delegate.h
index d0f0f028405..bb8b50b6354 100644
--- a/chromium/base/profiler/thread_delegate.h
+++ b/chromium/base/profiler/thread_delegate.h
@@ -8,58 +8,25 @@
 #include <vector>
 
 #include "base/base_export.h"
-#include "base/profiler/frame.h"
 #include "base/profiler/register_context.h"
 
 namespace base {
 
 // Platform-specific thread and stack manipulation delegate, for use by the
 // platform-independent stack copying/walking implementation in
-// StackSamplerImpl.
-//
-// IMPORTANT NOTE: Most methods in this interface are invoked while the target
-// thread is suspended so must not do any allocation from the heap, including
-// indirectly via use of DCHECK/CHECK or other logging statements. Otherwise the
-// implementation can deadlock on heap locks acquired by the target thread
-// before it was suspended. These functions are commented with "NO HEAP
-// ALLOCATIONS".
+// StackSamplerImpl. Provides the common interface across signal- and
+// suspend-based stack copy implementations.
 class BASE_EXPORT ThreadDelegate {
  public:
-  // Implementations of this interface should suspend the thread for the
-  // object's lifetime. NO HEAP ALLOCATIONS between the time the thread is
-  // suspended and resumed.
-  class BASE_EXPORT ScopedSuspendThread {
-   public:
-    ScopedSuspendThread() = default;
-    virtual ~ScopedSuspendThread() = default;
-
-    ScopedSuspendThread(const ScopedSuspendThread&) = delete;
-    ScopedSuspendThread& operator=(const ScopedSuspendThread&) = delete;
-
-    virtual bool WasSuccessful() const = 0;
-  };
-
   ThreadDelegate() = default;
   virtual ~ThreadDelegate() = default;
 
   ThreadDelegate(const ThreadDelegate&) = delete;
   ThreadDelegate& operator=(const ThreadDelegate&) = delete;
 
-  // Creates an object that holds the thread suspended for its lifetime.
-  virtual std::unique_ptr<ScopedSuspendThread> CreateScopedSuspendThread() = 0;
-
-  // Gets the register context for the thread.
-  // NO HEAP ALLOCATIONS.
-  virtual bool GetThreadContext(RegisterContext* thread_context) = 0;
-
   // Gets the base address of the thread's stack.
   virtual uintptr_t GetStackBaseAddress() const = 0;
 
-  // Returns true if the thread's stack can be copied, where the bottom address
-  // of the thread is at |stack_pointer|.
-  // NO HEAP ALLOCATIONS.
-  virtual bool CanCopyStack(uintptr_t stack_pointer) = 0;
-
   // Returns a list of registers that should be rewritten to point into the
   // stack copy, if they originally pointed into the original stack.
   // May heap allocate.