Revert 177827 "WebGL: Free temporary GPU resources held by inact..."

trunk/Source/platform/graphics/gpu/DrawingBufferTest.cpp

Index: trunk/Source/platform/graphics/gpu/DrawingBufferTest.cpp
===================================================================
--- trunk/Source/platform/graphics/gpu/DrawingBufferTest.cpp	(revision 177853)
+++ trunk/Source/platform/graphics/gpu/DrawingBufferTest.cpp	(working copy)
@@ -624,22 +624,4 @@
     }
 }
 
-TEST_F(DrawingBufferTest, verifySetIsHiddenProperlyAffectsMailboxes)
-{
-    blink::WebExternalTextureMailbox mailbox;
-
-    // Produce mailboxes.
-    m_drawingBuffer->markContentsChanged();
-    EXPECT_TRUE(m_drawingBuffer->prepareMailbox(&mailbox, 0));
-
-    unsigned waitSyncPoint = webContext()->insertSyncPoint();
-    mailbox.syncPoint = waitSyncPoint;
-    m_drawingBuffer->setIsHidden(true);
-    m_drawingBuffer->mailboxReleased(mailbox);
-    // m_drawingBuffer deletes mailbox immediately when hidden.
-    EXPECT_EQ(waitSyncPoint, webContext()->mostRecentlyWaitedSyncPoint());
-
-    m_drawingBuffer->beginDestruction();
-}
-
 } // namespace