Remove some unneeded DEPS from //sky

sky/engine/platform/graphics/Canvas2DLayerManager.cpp

-/*
-Copyright (C) 2012 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:
-1.  Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-2.  Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in the
-    documentation and/or other materials provided with the distribution.
-
-THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
-EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
-DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
-ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-#include "sky/engine/platform/graphics/Canvas2DLayerManager.h"
-
-#include "sky/engine/public/platform/Platform.h"
-#include "sky/engine/wtf/StdLibExtras.h"
-
-namespace {
-
-enum {
-    DefaultMaxBytesAllocated = 64*1024*1024,
-    DefaultTargetBytesAllocated = 16*1024*1024,
-};
-
-} // unnamed namespace
-
-namespace blink {
-
-Canvas2DLayerManager::Canvas2DLayerManager()
-    : m_bytesAllocated(0)
-    , m_maxBytesAllocated(DefaultMaxBytesAllocated)
-    , m_targetBytesAllocated(DefaultTargetBytesAllocated)
-    , m_limitPendingFramesTimer(this, &Canvas2DLayerManager::limitPendingFramesTimerFired)
-{
-}
-
-Canvas2DLayerManager::~Canvas2DLayerManager()
-{
-    ASSERT(!m_bytesAllocated);
-    ASSERT(!m_layerList.head());
-}
-
-void Canvas2DLayerManager::init(size_t maxBytesAllocated, size_t targetBytesAllocated)
-{
-    ASSERT(maxBytesAllocated >= targetBytesAllocated);
-    m_maxBytesAllocated = maxBytesAllocated;
-    m_targetBytesAllocated = targetBytesAllocated;
-    if (m_limitPendingFramesTimer.isActive())
-        m_limitPendingFramesTimer.stop();
-}
-
-Canvas2DLayerManager& Canvas2DLayerManager::get()
-{
-    DEFINE_STATIC_LOCAL(Canvas2DLayerManager, manager, ());
-    return manager;
-}
-
-void Canvas2DLayerManager::limitPendingFramesTimerFired(Timer<Canvas2DLayerManager>*)
-{
-    Canvas2DLayerBridge* layer = m_layerList.head();
-    while (layer) {
-        Canvas2DLayerBridge* currentLayer = layer;
-        // must increment iterator before calling limitPendingFrames, which
-        // may result in the layer being removed from the list.
-        layer = layer->next();
-        currentLayer->limitPendingFrames();
-    }
-}
-
-void Canvas2DLayerManager::layerDidDraw(Canvas2DLayerBridge* layer)
-{
-    if (isInList(layer)) {
-        if (layer != m_layerList.head()) {
-            m_layerList.remove(layer);
-            m_layerList.push(layer); // Set as MRU
-        }
-    }
-
-    if (!m_limitPendingFramesTimer.isActive())
-        m_limitPendingFramesTimer.startOneShot(0, FROM_HERE);
-}
-
-void Canvas2DLayerManager::layerTransientResourceAllocationChanged(Canvas2DLayerBridge* layer, intptr_t deltaBytes)
-{
-    ASSERT((intptr_t)m_bytesAllocated + deltaBytes >= 0);
-    m_bytesAllocated = (intptr_t)m_bytesAllocated + deltaBytes;
-    if (!isInList(layer) && layer->hasTransientResources()) {
-        m_layerList.push(layer);
-    } else if (isInList(layer) && !layer->hasTransientResources()) {
-        m_layerList.remove(layer);
-        layer->setNext(0);
-        layer->setPrev(0);
-    }
-
-    if (deltaBytes > 0)
-        freeMemoryIfNecessary();
-}
-
-void Canvas2DLayerManager::freeMemoryIfNecessary()
-{
-    if (m_bytesAllocated >= m_maxBytesAllocated) {
-        // Pass 1: Free memory from caches
-        Canvas2DLayerBridge* layer = m_layerList.tail(); // LRU
-        while (layer && m_bytesAllocated > m_targetBytesAllocated) {
-            Canvas2DLayerBridge* currentLayer = layer;
-            layer = layer->prev();
-            currentLayer->freeMemoryIfPossible(m_bytesAllocated - m_targetBytesAllocated);
-            ASSERT(isInList(currentLayer) == currentLayer->hasTransientResources());
-        }
-
-        // Pass 2: Flush canvases
-        layer = m_layerList.tail();
-        while (m_bytesAllocated > m_targetBytesAllocated && layer) {
-            Canvas2DLayerBridge* currentLayer = layer;
-            layer = layer->prev();
-            currentLayer->flush();
-            currentLayer->freeMemoryIfPossible(m_bytesAllocated - m_targetBytesAllocated);
-            ASSERT(isInList(currentLayer) == currentLayer->hasTransientResources());
-        }
-    }
-}
-
-bool Canvas2DLayerManager::isInList(Canvas2DLayerBridge* layer) const
-{
-    return layer->prev() || m_layerList.head() == layer;
-}
-
-} // namespace blink
-