Adding unit test for DrawingBuffer's bitmap recycling mechanism

third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.cpp

 /*
  * Copyright (c) 2010, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 229 matching lines @@
 {
     while (!m_recycledMailboxQueue.isEmpty()) {
         RefPtr<RecycledMailbox> recycled = m_recycledMailboxQueue.takeLast();
         deleteMailbox(recycled->mailbox, recycled->syncToken);
     }
 }
 
 std::unique_ptr<cc::SharedBitmap> DrawingBuffer::createOrRecycleBitmap()
 {
     size_t i = 0;
-    while (i < m_recycledBitmap.size()) {
-        if (m_recycledBitmap[i].size != m_size)
-            m_recycledBitmap.remove(i); // Removed this position so iterate on it again.
+    while (i < m_recycledBitmaps.size()) {
+        if (m_recycledBitmaps[i].size != m_size)
+            m_recycledBitmaps.remove(i); // Removed this position so iterate on it again.
         else
             ++i;
     }
-    if (!m_recycledBitmap.isEmpty()) {
-        RecycledBitmap recycled = std::move(m_recycledBitmap.last());
-        m_recycledBitmap.removeLast();
+    if (!m_recycledBitmaps.isEmpty()) {
+        RecycledBitmap recycled = std::move(m_recycledBitmaps.last());
+        m_recycledBitmaps.removeLast();
         DCHECK(recycled.size == m_size);
         return std::move(recycled.bitmap);
     }
 
     return Platform::current()->allocateSharedBitmap(m_size);
 }
 
 bool DrawingBuffer::PrepareTextureMailbox(cc::TextureMailbox* outMailbox, std::unique_ptr<cc::SingleReleaseCallback>* outReleaseCallback)
 {
     bool forceGpuResult = false;
@@ skipping 140 matching lines @@
     ASSERT_NOT_REACHED();
 }
 
 void DrawingBuffer::softwareMailboxReleased(std::unique_ptr<cc::SharedBitmap> bitmap, const IntSize& size, const gpu::SyncToken& syncToken, bool lostResource)
 {
     DCHECK(!syncToken.HasData()); // No sync tokens for software resources.
     if (m_destructionInProgress || lostResource || m_isHidden || size != m_size)
         return; // Just delete the bitmap.
 
     RecycledBitmap recycled = { std::move(bitmap), m_size };
-    m_recycledBitmap.append(std::move(recycled));
+    m_recycledBitmaps.append(std::move(recycled));
 }
 
 PassRefPtr<StaticBitmapImage> DrawingBuffer::transferToStaticBitmapImage()
 {
     // This can be null if the context is lost before the first call to grContext().
     GrContext* grContext = m_contextProvider->grContext();
 
     cc::TextureMailbox textureMailbox;
     std::unique_ptr<cc::SingleReleaseCallback> releaseCallback;
     bool success = false;
@@ skipping 810 matching lines @@
 
 void DrawingBuffer::restoreTextureBindings()
 {
     // This class potentially modifies the bindings for GL_TEXTURE_2D and
     // GL_TEXTURE_RECTANGLE. Only GL_TEXTURE_2D needs to be restored since
     // the public interface for WebGL does not support GL_TEXTURE_RECTANGLE.
     m_gl->BindTexture(GL_TEXTURE_2D, m_texture2DBinding);
 }
 
 } // namespace blink