[Chromium] RenderPass textures are evicted at the end of every frame

[Chromium] RenderPass textures are evicted at the end of every frame
https://bugs.webkit.org/show_bug.cgi?id=89786

Patch by Zeev Lieber <zlieber@chromium.org> on 2012-06-25
Reviewed by Adrienne Walker.

Source/WebCore:

Removed calls to TextureManager::reduceMemoryToLimit inside
finishDrawingFrame() method.

Added unit tests to verify new behavior.

* platform/graphics/chromium/LayerRendererChromium.cpp:
(WebCore::LayerRendererChromium::finishDrawingFrame):

Source/WebKit/chromium:

Added unit tests to verify large textures are staying in memory
and available for render pass optimization.

* tests/CCLayerTreeHostImplTest.cpp:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@121172 268f45cc-cd09-0410-ab3c-d52691b4dbfc