Remove some unneeded DEPS from //sky

sky/engine/platform/graphics/Canvas2DLayerBridge.cpp

Index: sky/engine/platform/graphics/Canvas2DLayerBridge.cpp
diff --git a/sky/engine/platform/graphics/Canvas2DLayerBridge.cpp b/sky/engine/platform/graphics/Canvas2DLayerBridge.cpp
deleted file mode 100644
index 7a2cabc8afdad4a643bd380dca356860fa840291..0000000000000000000000000000000000000000
--- a/sky/engine/platform/graphics/Canvas2DLayerBridge.cpp
+++ /dev/null
@@ -1,573 +0,0 @@
-/*
- * 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 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 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/Canvas2DLayerBridge.h"
-
-#include "sky/engine/platform/TraceEvent.h"
-#include "sky/engine/platform/graphics/Canvas2DLayerManager.h"
-#include "sky/engine/platform/graphics/ImageBuffer.h"
-#include "sky/engine/public/platform/Platform.h"
-#include "sky/engine/public/platform/WebGraphicsContext3D.h"
-#include "sky/engine/public/platform/WebGraphicsContext3DProvider.h"
-#include "sky/engine/wtf/RefCountedLeakCounter.h"
-#include "third_party/skia/include/core/SkDevice.h"
-#include "third_party/skia/include/core/SkSurface.h"
-#include "third_party/skia/include/gpu/GrContext.h"
-
-namespace {
-enum {
-    InvalidMailboxIndex = -1,
-};
-
-DEFINE_DEBUG_ONLY_GLOBAL(WTF::RefCountedLeakCounter, canvas2DLayerBridgeInstanceCounter, ("Canvas2DLayerBridge"));
-}
-
-namespace blink {
-
-static PassRefPtr<SkSurface> createSkSurface(GrContext* gr, const IntSize& size, int msaaSampleCount = 0)
-{
-    if (!gr)
-        return nullptr;
-    gr->resetContext();
-    SkImageInfo info = SkImageInfo::MakeN32Premul(size.width(), size.height());
-    SkSurfaceProps disableLCDProps(0, kUnknown_SkPixelGeometry);
-    return adoptRef(SkSurface::NewRenderTarget(gr, SkSurface::kNo_Budgeted, info,  msaaSampleCount, &disableLCDProps));
-}
-
-PassRefPtr<Canvas2DLayerBridge> Canvas2DLayerBridge::create(const IntSize& size, OpacityMode opacityMode, int msaaSampleCount)
-{
-    TRACE_EVENT_INSTANT0("test_gpu", "Canvas2DLayerBridgeCreation", TRACE_EVENT_SCOPE_NAME_PROCESS);
-    OwnPtr<WebGraphicsContext3DProvider> contextProvider = adoptPtr(Platform::current()->createSharedOffscreenGraphicsContext3DProvider());
-    if (!contextProvider)
-        return nullptr;
-    RefPtr<SkSurface> surface(createSkSurface(contextProvider->grContext(), size, msaaSampleCount));
-    if (!surface)
-        return nullptr;
-    RefPtr<Canvas2DLayerBridge> layerBridge;
-    OwnPtr<SkDeferredCanvas> canvas = adoptPtr(SkDeferredCanvas::Create(surface.get()));
-    layerBridge = adoptRef(new Canvas2DLayerBridge(contextProvider.release(), canvas.release(), surface.release(), msaaSampleCount, opacityMode));
-    return layerBridge.release();
-}
-
-Canvas2DLayerBridge::Canvas2DLayerBridge(PassOwnPtr<WebGraphicsContext3DProvider> contextProvider, PassOwnPtr<SkDeferredCanvas> canvas, PassRefPtr<SkSurface> surface, int msaaSampleCount, OpacityMode opacityMode)
-    : m_canvas(canvas)
-    , m_surface(surface)
-    , m_contextProvider(contextProvider)
-    , m_imageBuffer(0)
-    , m_msaaSampleCount(msaaSampleCount)
-    , m_bytesAllocated(0)
-    , m_didRecordDrawCommand(false)
-    , m_isSurfaceValid(true)
-    , m_framesPending(0)
-    , m_framesSinceMailboxRelease(0)
-    , m_destructionInProgress(false)
-    , m_rateLimitingEnabled(false)
-    , m_isHidden(false)
-    , m_next(0)
-    , m_prev(0)
-    , m_lastImageId(0)
-    , m_releasedMailboxInfoIndex(InvalidMailboxIndex)
-{
-    ASSERT(m_canvas);
-    ASSERT(m_surface);
-    ASSERT(m_contextProvider);
-    // Used by browser tests to detect the use of a Canvas2DLayerBridge.
-    TRACE_EVENT_INSTANT0("test_gpu", "Canvas2DLayerBridgeCreation", TRACE_EVENT_SCOPE_NAME_PROCESS);
-    m_layer = nullptr;
-    CRASH(); // No compositor.
-    m_layer->setOpaque(opacityMode == Opaque);
-    m_layer->setBlendBackgroundColor(opacityMode != Opaque);
-    m_layer->setRateLimitContext(m_rateLimitingEnabled);
-    m_canvas->setNotificationClient(this);
-#ifndef NDEBUG
-    canvas2DLayerBridgeInstanceCounter.increment();
-#endif
-}
-
-Canvas2DLayerBridge::~Canvas2DLayerBridge()
-{
-    ASSERT(m_destructionInProgress);
-    ASSERT(!Canvas2DLayerManager::get().isInList(this));
-    m_layer.clear();
-    freeReleasedMailbox();
-#if ENABLE(ASSERT)
-    Vector<MailboxInfo>::iterator mailboxInfo;
-    for (mailboxInfo = m_mailboxes.begin(); mailboxInfo < m_mailboxes.end(); ++mailboxInfo) {
-        ASSERT(mailboxInfo->m_status != MailboxInUse);
-        ASSERT(mailboxInfo->m_status != MailboxReleased || m_contextProvider->context3d()->isContextLost() || !m_isSurfaceValid);
-    }
-#endif
-    m_mailboxes.clear();
-#ifndef NDEBUG
-    canvas2DLayerBridgeInstanceCounter.decrement();
-#endif
-}
-
-void Canvas2DLayerBridge::beginDestruction()
-{
-    ASSERT(!m_destructionInProgress);
-    setRateLimitingEnabled(false);
-    m_canvas->silentFlush();
-    m_imageBuffer = 0;
-    freeTransientResources();
-    setIsHidden(true);
-    m_destructionInProgress = true;
-    m_canvas->setNotificationClient(0);
-    m_surface.clear();
-    m_canvas.clear();
-    m_layer->clearTexture();
-    // Orphaning the layer is required to trigger the recration of a new layer
-    // in the case where destruction is caused by a canvas resize. Test:
-    // virtual/gpu/fast/canvas/canvas-resize-after-paint-without-layout.html
-    m_layer->layer()->removeFromParent();
-    // To anyone who ever hits this assert: Please update crbug.com/344666
-    // with repro steps.
-    ASSERT(!m_bytesAllocated);
-}
-
-void Canvas2DLayerBridge::setIsHidden(bool hidden)
-{
-    ASSERT(!m_destructionInProgress);
-    bool newHiddenValue = hidden || m_destructionInProgress;
-    if (m_isHidden == newHiddenValue)
-        return;
-
-    m_isHidden = newHiddenValue;
-    if (isHidden()) {
-        freeTransientResources();
-    }
-}
-
-void Canvas2DLayerBridge::willAccessPixels()
-{
-    // A readback operation may alter the texture parameters, which may affect
-    // the compositor's behavior. Therefore, we must trigger copy-on-write
-    // even though we are not technically writing to the texture, only to its
-    // parameters.
-    m_surface->notifyContentWillChange(SkSurface::kRetain_ContentChangeMode);
-}
-
-void Canvas2DLayerBridge::freeTransientResources()
-{
-    ASSERT(!m_destructionInProgress);
-    if (!m_isSurfaceValid)
-        return;
-    freeReleasedMailbox();
-    flush();
-    freeMemoryIfPossible(bytesAllocated());
-    ASSERT(!hasTransientResources());
-}
-
-bool Canvas2DLayerBridge::hasTransientResources() const
-{
-    return !m_destructionInProgress && (hasReleasedMailbox() || bytesAllocated());
-}
-
-void Canvas2DLayerBridge::limitPendingFrames()
-{
-    ASSERT(!m_destructionInProgress);
-    if (isHidden()) {
-        freeTransientResources();
-        return;
-    }
-    if (m_didRecordDrawCommand) {
-        m_framesPending++;
-        m_didRecordDrawCommand = false;
-        if (m_framesPending > 1) {
-            // Turn on the rate limiter if this layer tends to accumulate a
-            // non-discardable multi-frame backlog of draw commands.
-            setRateLimitingEnabled(true);
-        }
-        if (m_rateLimitingEnabled) {
-            flush();
-        }
-    }
-    ++m_framesSinceMailboxRelease;
-    if (releasedMailboxHasExpired()) {
-        freeReleasedMailbox();
-    }
-}
-
-void Canvas2DLayerBridge::prepareForDraw()
-{
-    ASSERT(!m_destructionInProgress);
-    ASSERT(m_layer);
-    if (!checkSurfaceValid()) {
-        if (m_canvas) {
-            // drop pending commands because there is no surface to draw to
-            m_canvas->silentFlush();
-        }
-        return;
-    }
-}
-
-void Canvas2DLayerBridge::storageAllocatedForRecordingChanged(size_t bytesAllocated)
-{
-    ASSERT(!m_destructionInProgress);
-    intptr_t delta = (intptr_t)bytesAllocated - (intptr_t)m_bytesAllocated;
-    m_bytesAllocated = bytesAllocated;
-    Canvas2DLayerManager::get().layerTransientResourceAllocationChanged(this, delta);
-}
-
-size_t Canvas2DLayerBridge::storageAllocatedForRecording()
-{
-    return m_canvas->storageAllocatedForRecording();
-}
-
-void Canvas2DLayerBridge::flushedDrawCommands()
-{
-    ASSERT(!m_destructionInProgress);
-    storageAllocatedForRecordingChanged(storageAllocatedForRecording());
-    m_framesPending = 0;
-}
-
-void Canvas2DLayerBridge::skippedPendingDrawCommands()
-{
-    ASSERT(!m_destructionInProgress);
-    // Stop triggering the rate limiter if SkDeferredCanvas is detecting
-    // and optimizing overdraw.
-    setRateLimitingEnabled(false);
-    flushedDrawCommands();
-}
-
-void Canvas2DLayerBridge::setRateLimitingEnabled(bool enabled)
-{
-    ASSERT(!m_destructionInProgress);
-    if (m_rateLimitingEnabled != enabled) {
-        m_rateLimitingEnabled = enabled;
-        m_layer->setRateLimitContext(m_rateLimitingEnabled);
-    }
-}
-
-size_t Canvas2DLayerBridge::freeMemoryIfPossible(size_t bytesToFree)
-{
-    ASSERT(!m_destructionInProgress);
-    size_t bytesFreed = m_canvas->freeMemoryIfPossible(bytesToFree);
-    m_bytesAllocated -= bytesFreed;
-    if (bytesFreed)
-        Canvas2DLayerManager::get().layerTransientResourceAllocationChanged(this, -((intptr_t)bytesFreed));
-    return bytesFreed;
-}
-
-void Canvas2DLayerBridge::flush()
-{
-    ASSERT(!m_destructionInProgress);
-    if (m_canvas->hasPendingCommands()) {
-        TRACE_EVENT0("cc", "Canvas2DLayerBridge::flush");
-        freeReleasedMailbox(); // To avoid unnecessary triple-buffering
-        m_canvas->flush();
-    }
-}
-
-bool Canvas2DLayerBridge::releasedMailboxHasExpired()
-{
-    // This heuristic indicates that the canvas is not being
-    // actively presented by the compositor (3 frames rendered since
-    // last mailbox release), suggesting that double buffering is not required.
-    return hasReleasedMailbox() && m_framesSinceMailboxRelease > 2;
-}
-
-Canvas2DLayerBridge::MailboxInfo* Canvas2DLayerBridge::releasedMailboxInfo()
-{
-    return hasReleasedMailbox() ? &m_mailboxes[m_releasedMailboxInfoIndex] : 0;
-}
-
-bool Canvas2DLayerBridge::hasReleasedMailbox() const
-{
-    return m_releasedMailboxInfoIndex != InvalidMailboxIndex;
-}
-
-void Canvas2DLayerBridge::freeReleasedMailbox()
-{
-    if (!m_isSurfaceValid || m_contextProvider->context3d()->isContextLost())
-        return;
-    MailboxInfo* mailboxInfo = releasedMailboxInfo();
-    if (!mailboxInfo)
-        return;
-
-    ASSERT(mailboxInfo->m_status == MailboxReleased);
-    if (mailboxInfo->m_mailbox.syncPoint) {
-        context()->waitSyncPoint(mailboxInfo->m_mailbox.syncPoint);
-        mailboxInfo->m_mailbox.syncPoint = 0;
-    }
-    // Invalidate texture state in case the compositor altered it since the copy-on-write.
-    if (mailboxInfo->m_image) {
-        mailboxInfo->m_image->getTexture()->textureParamsModified();
-        mailboxInfo->m_image.clear();
-    }
-    mailboxInfo->m_status = MailboxAvailable;
-    m_releasedMailboxInfoIndex = InvalidMailboxIndex;
-    Canvas2DLayerManager::get().layerTransientResourceAllocationChanged(this);
-}
-
-WebGraphicsContext3D* Canvas2DLayerBridge::context()
-{
-    // Check on m_layer is necessary because context() may be called during
-    // the destruction of m_layer
-    if (m_layer && !m_destructionInProgress)
-        checkSurfaceValid(); // To ensure rate limiter is disabled if context is lost.
-    return m_contextProvider ? m_contextProvider->context3d() : 0;
-}
-
-bool Canvas2DLayerBridge::checkSurfaceValid()
-{
-    ASSERT(!m_destructionInProgress);
-    if (m_destructionInProgress || !m_isSurfaceValid)
-        return false;
-    if (m_contextProvider->context3d()->isContextLost()) {
-        m_isSurfaceValid = false;
-        m_surface.clear();
-        if (m_imageBuffer)
-            m_imageBuffer->notifySurfaceInvalid();
-        setRateLimitingEnabled(false);
-    }
-    return m_isSurfaceValid;
-}
-
-bool Canvas2DLayerBridge::restoreSurface()
-{
-    ASSERT(!m_destructionInProgress);
-    if (m_destructionInProgress)
-        return false;
-    ASSERT(m_layer && !m_isSurfaceValid);
-
-    WebGraphicsContext3D* sharedContext = 0;
-    // We must clear the mailboxes before calling m_layer->clearTexture() to prevent
-    // re-entry via mailboxReleased from operating on defunct GrContext objects.
-    m_mailboxes.clear();
-    m_releasedMailboxInfoIndex = InvalidMailboxIndex;
-    m_layer->clearTexture();
-    m_contextProvider = adoptPtr(Platform::current()->createSharedOffscreenGraphicsContext3DProvider());
-    if (m_contextProvider)
-        sharedContext = m_contextProvider->context3d();
-
-    if (sharedContext && !sharedContext->isContextLost()) {
-        IntSize size(m_canvas->getTopDevice()->width(), m_canvas->getTopDevice()->height());
-        RefPtr<SkSurface> surface(createSkSurface(m_contextProvider->grContext(), size, m_msaaSampleCount));
-        if (surface.get()) {
-            m_surface = surface.release();
-            m_canvas->setSurface(m_surface.get());
-            m_isSurfaceValid = true;
-            // FIXME: draw sad canvas picture into new buffer crbug.com/243842
-        }
-    }
-
-    return m_isSurfaceValid;
-}
-
-bool Canvas2DLayerBridge::prepareMailbox(WebExternalTextureMailbox* outMailbox, WebExternalBitmap* bitmap)
-{
-    if (m_destructionInProgress) {
-        // It can be hit in the following sequence.
-        // 1. Canvas draws something.
-        // 2. The compositor begins the frame.
-        // 3. Javascript makes a context be lost.
-        // 4. Here.
-        return false;
-    }
-    if (bitmap) {
-        // Using accelerated 2d canvas with software renderer, which
-        // should only happen in tests that use fake graphics contexts
-        // or in Android WebView in software mode. In this case, we do
-        // not care about producing any results for this canvas.
-        m_canvas->silentFlush();
-        m_lastImageId = 0;
-        return false;
-    }
-    if (!checkSurfaceValid())
-        return false;
-
-    WebGraphicsContext3D* webContext = context();
-
-    // Release to skia textures that were previouosly released by the
-    // compositor. We do this before acquiring the next snapshot in
-    // order to cap maximum gpu memory consumption.
-    flush();
-
-    RefPtr<SkImage> image = adoptRef(m_canvas->newImageSnapshot());
-
-    // Early exit if canvas was not drawn to since last prepareMailbox
-    if (image->uniqueID() == m_lastImageId)
-        return false;
-    m_lastImageId = image->uniqueID();
-
-    MailboxInfo* mailboxInfo = createMailboxInfo();
-    mailboxInfo->m_status = MailboxInUse;
-    mailboxInfo->m_image = image;
-
-    ASSERT(mailboxInfo->m_mailbox.syncPoint == 0);
-    ASSERT(mailboxInfo->m_image.get());
-    ASSERT(mailboxInfo->m_image->getTexture());
-
-    // Because of texture sharing with the compositor, we must invalidate
-    // the state cached in skia so that the deferred copy on write
-    // in SkSurface_Gpu does not make any false assumptions.
-    mailboxInfo->m_image->getTexture()->textureParamsModified();
-
-    webContext->bindTexture(GL_TEXTURE_2D, mailboxInfo->m_image->getTexture()->getTextureHandle());
-    webContext->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-    webContext->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-    webContext->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-    webContext->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-    webContext->produceTextureCHROMIUM(GL_TEXTURE_2D, mailboxInfo->m_mailbox.name);
-    if (isHidden()) {
-        // With hidden canvases, we release the SkImage immediately because
-        // there is no need for animations to be double buffered.
-        mailboxInfo->m_image.clear();
-    } else {
-        webContext->flush();
-        mailboxInfo->m_mailbox.syncPoint = webContext->insertSyncPoint();
-    }
-    webContext->bindTexture(GL_TEXTURE_2D, 0);
-    // Because we are changing the texture binding without going through skia,
-    // we must dirty the context.
-    m_contextProvider->grContext()->resetContext(kTextureBinding_GrGLBackendState);
-
-    // set m_parentLayerBridge to make sure 'this' stays alive as long as it has
-    // live mailboxes
-    ASSERT(!mailboxInfo->m_parentLayerBridge);
-    mailboxInfo->m_parentLayerBridge = this;
-    *outMailbox = mailboxInfo->m_mailbox;
-
-    return true;
-}
-
-Canvas2DLayerBridge::MailboxInfo* Canvas2DLayerBridge::createMailboxInfo() {
-    ASSERT(!m_destructionInProgress);
-    MailboxInfo* mailboxInfo;
-    for (mailboxInfo = m_mailboxes.begin(); mailboxInfo < m_mailboxes.end(); mailboxInfo++) {
-        if (mailboxInfo->m_status == MailboxAvailable) {
-            return mailboxInfo;
-        }
-    }
-
-    // No available mailbox: create one.
-    m_mailboxes.grow(m_mailboxes.size() + 1);
-    mailboxInfo = &m_mailboxes.last();
-    context()->genMailboxCHROMIUM(mailboxInfo->m_mailbox.name);
-    // Worst case, canvas is triple buffered.  More than 3 active mailboxes
-    // means there is a problem.
-    // For the single-threaded case, this value needs to be at least
-    // kMaxSwapBuffersPending+1 (in render_widget.h).
-    // Because of crbug.com/247874, it needs to be kMaxSwapBuffersPending+2.
-    // TODO(piman): fix this.
-    ASSERT(m_mailboxes.size() <= 4);
-    ASSERT(mailboxInfo < m_mailboxes.end());
-    return mailboxInfo;
-}
-
-void Canvas2DLayerBridge::mailboxReleased(const WebExternalTextureMailbox& mailbox, bool lostResource)
-{
-    freeReleasedMailbox(); // Never have more than one mailbox in the released state.
-    bool contextLost = !m_isSurfaceValid || m_contextProvider->context3d()->isContextLost();
-    Vector<MailboxInfo>::iterator mailboxInfo;
-    for (mailboxInfo = m_mailboxes.begin(); mailboxInfo < m_mailboxes.end(); ++mailboxInfo) {
-        if (nameEquals(mailboxInfo->m_mailbox, mailbox)) {
-            mailboxInfo->m_mailbox.syncPoint = mailbox.syncPoint;
-            ASSERT(mailboxInfo->m_status == MailboxInUse);
-            ASSERT(mailboxInfo->m_parentLayerBridge.get() == this);
-
-            if (contextLost) {
-                // No need to clean up the mailbox resource, but make sure the
-                // mailbox can also be reusable once the context is restored.
-                mailboxInfo->m_status = MailboxAvailable;
-                m_releasedMailboxInfoIndex = InvalidMailboxIndex;
-                Canvas2DLayerManager::get().layerTransientResourceAllocationChanged(this);
-            } else if (lostResource) {
-                // In case of the resource is lost, we need to delete the backing
-                // texture and remove the mailbox from list to avoid reusing it
-                // in future.
-                if (mailboxInfo->m_image) {
-                    GrTexture* texture = mailboxInfo->m_image->getTexture();
-                    if (texture)
-                        texture->textureParamsModified();
-                    mailboxInfo->m_image.clear();
-                }
-                size_t i = mailboxInfo - m_mailboxes.begin();
-                m_mailboxes.remove(i);
-                Canvas2DLayerManager::get().layerTransientResourceAllocationChanged(this);
-                // Here we need to return early since mailboxInfo removal would
-                // also clear m_parentLayerBridge reference.
-                return;
-            } else {
-                mailboxInfo->m_status = MailboxReleased;
-                m_releasedMailboxInfoIndex = mailboxInfo - m_mailboxes.begin();
-                m_framesSinceMailboxRelease = 0;
-                if (isHidden()) {
-                    freeReleasedMailbox();
-                } else {
-                    ASSERT(!m_destructionInProgress);
-                    Canvas2DLayerManager::get().layerTransientResourceAllocationChanged(this);
-                }
-            }
-            // Trigger Canvas2DLayerBridge self-destruction if this is the
-            // last live mailbox and the layer bridge is not externally
-            // referenced.
-            mailboxInfo->m_parentLayerBridge.clear();
-            return;
-        }
-    }
-}
-
-WebLayer* Canvas2DLayerBridge::layer() const
-{
-    ASSERT(!m_destructionInProgress);
-    ASSERT(m_layer);
-    return m_layer->layer();
-}
-
-void Canvas2DLayerBridge::finalizeFrame()
-{
-    ASSERT(!m_destructionInProgress);
-    Canvas2DLayerManager::get().layerDidDraw(this);
-    m_didRecordDrawCommand = true;
-}
-
-Platform3DObject Canvas2DLayerBridge::getBackingTexture()
-{
-    ASSERT(!m_destructionInProgress);
-    if (!checkSurfaceValid())
-        return 0;
-    m_canvas->flush();
-    context()->flush();
-    GrRenderTarget* renderTarget = m_canvas->getTopDevice()->accessRenderTarget();
-    if (renderTarget) {
-        return renderTarget->asTexture()->getTextureHandle();
-    }
-    return 0;
-}
-
-Canvas2DLayerBridge::MailboxInfo::MailboxInfo(const MailboxInfo& other) {
-    // This copy constructor should only be used for Vector reallocation
-    // Assuming 'other' is to be destroyed, we transfer m_image and
-    // m_parentLayerBridge ownership rather than do a refcount dance.
-    memcpy(&m_mailbox, &other.m_mailbox, sizeof(m_mailbox));
-    m_image = const_cast<MailboxInfo*>(&other)->m_image.release();
-    m_parentLayerBridge = const_cast<MailboxInfo*>(&other)->m_parentLayerBridge.release();
-    m_status = other.m_status;
-}
-
-} // namespace blink