Add GLES2Implemention::FreeUnusedSharedMemory

gpu/command_buffer/client/fenced_allocator.h

 // Copyright (c) 2009 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.
 
 // This file contains the definition of the FencedAllocator class.
 
 #ifndef GPU_COMMAND_BUFFER_CLIENT_FENCED_ALLOCATOR_H_
 #define GPU_COMMAND_BUFFER_CLIENT_FENCED_ALLOCATOR_H_
 
 #include <vector>
@@ skipping 60 matching lines @@
 
   // Gets the size of the largest free block that can be allocated if the
   // caller can wait. Allocating a block of this size will succeed, but may
   // block.
   unsigned int GetLargestFreeOrPendingSize();
 
   // Checks for consistency inside the book-keeping structures. Used for
   // testing.
   bool CheckConsistency();
 
+  // True if any memory is allocated.
+  bool InUse();
+
  private:
   // Status of a block of memory, for book-keeping.
   enum State {
     IN_USE,
     FREE,
     FREE_PENDING_TOKEN
   };
 
   // Book-keeping sturcture that describes a block of memory.
   struct Block {
@@ skipping 133 matching lines @@
   unsigned int GetLargestFreeOrPendingSize() {
     return allocator_.GetLargestFreeOrPendingSize();
   }
 
   // Checks for consistency inside the book-keeping structures. Used for
   // testing.
   bool CheckConsistency() {
     return allocator_.CheckConsistency();
   }
 
+  // True if any memory is allocated.
+  bool InUse() {
+    return allocator_.InUse();
+  }
+
   FencedAllocator &allocator() { return allocator_; }
 
  private:
   FencedAllocator allocator_;
   void* base_;
   DISALLOW_IMPLICIT_CONSTRUCTORS(FencedAllocatorWrapper);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_FENCED_ALLOCATOR_H_