cc: Give ownership of render passes to the renderer when drawing a frame.

cc/direct_renderer.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/direct_renderer.h"
 
 #include <vector>
 
 #include "base/debug/trace_event.h"
 #include "cc/math_util.h"
@@ skipping 131 matching lines @@
         m_renderPassTextures.erase(passesToDelete[i]);
 
     for (size_t i = 0; i < renderPassesInDrawOrder.size(); ++i) {
         if (!m_renderPassTextures.contains(renderPassesInDrawOrder[i]->id)) {
           scoped_ptr<CachedResource> texture = CachedResource::create(m_resourceProvider);
             m_renderPassTextures.set(renderPassesInDrawOrder[i]->id, texture.Pass());
         }
     }
 }
 
-void DirectRenderer::drawFrame(const RenderPassList& renderPassesInDrawOrder, const RenderPassIdHashMap& renderPassesById)
+void DirectRenderer::drawFrame(RenderPassList& renderPassesInDrawOrder, RenderPassIdHashMap& renderPassesById)
 {
     TRACE_EVENT0("cc", "DirectRenderer::drawFrame");
     const RenderPass* rootRenderPass = renderPassesInDrawOrder.back();
     DCHECK(rootRenderPass);
 
     DrawingFrame frame;
     frame.renderPassesById = &renderPassesById;
     frame.rootRenderPass = rootRenderPass;
     frame.rootDamageRect = capabilities().usingPartialSwap ? rootRenderPass->damage_rect : rootRenderPass->output_rect;
     frame.rootDamageRect.Intersect(gfx::Rect(gfx::Point(), viewportSize()));
 
     beginDrawingFrame(frame);
     for (size_t i = 0; i < renderPassesInDrawOrder.size(); ++i)
         drawRenderPass(frame, renderPassesInDrawOrder[i]);
     finishDrawingFrame(frame);
+
+    renderPassesInDrawOrder.clear();
+    renderPassesById.clear();
 }
 
 gfx::RectF DirectRenderer::computeScissorRectForRenderPass(const DrawingFrame& frame)
 {
     gfx::RectF renderPassScissor = frame.currentRenderPass->output_rect;
 
     if (frame.rootDamageRect == frame.rootRenderPass->output_rect)
         return renderPassScissor;
 
     gfx::Transform inverseTransform = MathUtil::inverse(frame.currentRenderPass->transform_to_root_target);
@@ skipping 101 matching lines @@
     return pass->output_rect.size();
 }
 
 // static
 GLenum DirectRenderer::renderPassTextureFormat(const RenderPass*)
 {
     return GL_RGBA;
 }
 
 }  // namespace cc