[WIP] Add SharedMemoryTracker to dump base::SharedMemory usage

gpu/command_buffer/client/gles2_implementation_unittest.cc

 // 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.
 
 // Tests for GLES2Implementation.
 
 #include "gpu/command_buffer/client/gles2_implementation.h"
 
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
@@ skipping 131 matching lines @@
   int GetResultOffset() override;
   void Free() override;
   bool HaveBuffer() const override;
   void* AllocUpTo(unsigned int size, unsigned int* size_allocated) override;
   void* Alloc(unsigned int size) override;
   RingBuffer::Offset GetOffset(void* pointer) const override;
   void DiscardBlock(void* p) override;
   void FreePendingToken(void* p, unsigned int /* token */) override;
   unsigned int GetSize() const override;
   unsigned int GetFreeSize() const override;
+  base::SharedMemory* GetSharedMemory() const override;
 
   size_t MaxTransferBufferSize() {
     return size_ - result_size_;
   }
 
   unsigned int RoundToAlignment(unsigned int size) {
     return (size + alignment_ - 1) & ~(alignment_ - 1);
   }
 
   bool InSync() {
@@ skipping 160 matching lines @@
 }
 
 unsigned int MockTransferBuffer::GetSize() const {
   return 0;
 }
 
 unsigned int MockTransferBuffer::GetFreeSize() const {
   return 0;
 }
 
+base::SharedMemory* MockTransferBuffer::GetSharedMemory() const {
+  return nullptr;
+}
+
 // API wrapper for Buffers.
 class GenBuffersAPI {
  public:
   static void Gen(GLES2Implementation* gl_impl, GLsizei n, GLuint* ids) {
     gl_impl->GenBuffers(n, ids);
   }
 
   static void Delete(GLES2Implementation* gl_impl,
                      GLsizei n,
                      const GLuint* ids) {
@@ skipping 4322 matching lines @@
   ContextInitOptions init_options;
   init_options.transfer_buffer_initialize_fail = true;
   EXPECT_FALSE(Initialize(init_options));
 }
 
 #include "base/macros.h"
 #include "gpu/command_buffer/client/gles2_implementation_unittest_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu