cc: Partial tile update for one-copy raster.

cc/resources/resource_pool.h

Index: cc/resources/resource_pool.h
diff --git a/cc/resources/resource_pool.h b/cc/resources/resource_pool.h
index f79455905dd4513deb491b250a723b445c593d38..0889a350bd2ce5ae97d286f5f24863a95fbd3413 100644
--- a/cc/resources/resource_pool.h
+++ b/cc/resources/resource_pool.h
@@ -5,7 +5,7 @@
 #ifndef CC_RESOURCES_RESOURCE_POOL_H_
 #define CC_RESOURCES_RESOURCE_POOL_H_
 
-#include <list>
+#include <deque>
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
@@ -27,7 +27,10 @@ class CC_EXPORT ResourcePool {
 
   scoped_ptr<ScopedResource> AcquireResource(const gfx::Size& size,
                                              ResourceFormat format);
-  void ReleaseResource(scoped_ptr<ScopedResource>);
+  scoped_ptr<ScopedResource> TryAcquireOldResource(const gfx::Size& size,
+                                                   ResourceFormat format,
+                                                   uint64 id);
+  void ReleaseResource(scoped_ptr<ScopedResource> resource, uint64_t id);
 
   void SetResourceUsageLimits(size_t max_memory_usage_bytes,
                               size_t max_unused_memory_usage_bytes,
@@ -55,7 +58,7 @@ class CC_EXPORT ResourcePool {
   bool ResourceUsageTooHigh();
 
  private:
-  void DidFinishUsingResource(ScopedResource* resource);
+  void DidFinishUsingResource(ScopedResource* resource, uint64_t id);
 
   ResourceProvider* resource_provider_;
   const GLenum target_;
@@ -66,7 +69,13 @@ class CC_EXPORT ResourcePool {
   size_t unused_memory_usage_bytes_;
   size_t resource_count_;
 
-  typedef std::list<ScopedResource*> ResourceList;
+  struct PoolResource {
+    PoolResource(ScopedResource* resource, uint64_t id)
+        : resource(resource), id(id) {}
+    ScopedResource* resource;
+    uint64_t id;
+  };
+  typedef std::deque<PoolResource> ResourceList;
   ResourceList unused_resources_;
   ResourceList busy_resources_;