Reviewed by James Robinson.

        [chromium] Add command-line flag to enable composite to offscreen texture.
        https://bugs.webkit.org/show_bug.cgi?id=52311

        Add plumbing to allow command-line switch to enable offscreen compositing. Function
        LayerRendererChromium::copyOffscreenTextureToDisplay used for now to mimic
        normal renderer operation.

        Existing functionality not changed; offscreen compositing will be tested via GPU test framework.

        * platform/graphics/chromium/LayerRendererChromium.cpp:
        (WebCore::LayerRendererChromium::setRootLayer):
        (WebCore::LayerRendererChromium::setCompositeOffscreen):
        (WebCore::LayerRendererChromium::copyOffscreenTextureToDisplay):
        (WebCore::LayerRendererChromium::useRenderSurface):
        (WebCore::LayerRendererChromium::setScissorToRect):
        * platform/graphics/chromium/LayerRendererChromium.h:
        (WebCore::LayerRendererChromium::isCompositingOffscreen):
2011-02-17  W. James MacLean  <wjmaclean@chromium.org>

        Reviewed by James Robinson.

        [chromium] Add command-line flag to enable composite to offscreen texture.
        https://bugs.webkit.org/show_bug.cgi?id=52311

        Add plumbing to allow command-line switch to enable offscreen compositing. Function
        LayerRendererChromium::copyOffscreenTextureToDisplay used for now to mimic
        normal renderer operation.

        * public/WebSettings.h:
        * src/WebSettingsImpl.cpp:
        (WebKit::WebSettingsImpl::WebSettingsImpl):
        (WebKit::WebSettingsImpl::setCompositeToTextureEnabled):
        * src/WebSettingsImpl.h:
        (WebKit::WebSettingsImpl::compositeToTextureEnabled):
        * src/WebViewImpl.cpp:
        (WebKit::WebViewImpl::doComposite):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@78853 268f45cc-cd09-0410-ab3c-d52691b4dbfc