Merge 89635 - 2011-06-23 John Bates <jbates@google.com>

Merge 89635 - 2011-06-23  John Bates  <jbates@google.com>;

        Reviewed by James Robinson.

        Fix latch deadlock when GPU process crashes or context is lost.
        https://bugs.webkit.org/show_bug.cgi?id=63189
        The main bug fix is to only set/wait latches if the child context has no errors.
        Additionally, the LayerChromium classes needed to be modified to not continue drawing when
        their corresponding contexts have errors. Otherwise, they would draw with invalid texture ids.

        Test: open particles WebGL demo in chrome, kill GPU process from Task Manager; observe no deadlock.

        * platform/graphics/chromium/LayerRendererChromium.cpp:
        (WebCore::LayerRendererChromium::LayerRendererChromium):
        (WebCore::LayerRendererChromium::updateAndDrawLayers):
        (WebCore::LayerRendererChromium::updateLayers):
        (WebCore::LayerRendererChromium::isCompositorContextLost):
        * platform/graphics/chromium/LayerRendererChromium.h:
        * platform/graphics/chromium/WebGLLayerChromium.cpp:
        (WebCore::WebGLLayerChromium::drawsContent):
        (WebCore::WebGLLayerChromium::updateCompositorResources):
        (WebCore::WebGLLayerChromium::setContext):
        * platform/graphics/chromium/WebGLLayerChromium.h:
        * platform/graphics/chromium/Canvas2DLayerChromium.cpp:
        (WebCore::Canvas2DLayerChromium::drawsContent):
        * platform/graphics/chromium/Canvas2DLayerChromium.h:
2011-06-23  John Bates  <jbates@google.com>;

        Reviewed by James Robinson.

        Fix latch deadlock when GPU process crashes or context is lost
        https://bugs.webkit.org/show_bug.cgi?id=63189

        * src/WebViewImpl.cpp:
        (WebKit::WebViewImpl::composite):

BUG=84065
TBR=commit-queue@webkit.org
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=89960