Add logic to GLRenderer to support RenderPassDrawQuad copying.

cc/resources/resource_pool.cc

Index: cc/resources/resource_pool.cc
diff --git a/cc/resources/resource_pool.cc b/cc/resources/resource_pool.cc
index 469f790f28c0ecdc40447f11cbd06a765366c896..6eeccf22f4b9a1db3a4ff43af88d3c7598fbb981 100644
--- a/cc/resources/resource_pool.cc
+++ b/cc/resources/resource_pool.cc
@@ -211,14 +211,28 @@ Resource* ResourcePool::TryAcquireResourceForPartialRaster(
   return nullptr;
 }
 
+void ResourcePool::ReleaseResourceIfFound(ResourceId resource_id) {
+  auto it = in_use_resources_.find(resource_id);
+  if (it == in_use_resources_.end())
+    return;
+  ReleaseResource(resource_id);
+}
+
 void ResourcePool::ReleaseResource(Resource* resource) {
   // Ensure that the provided resource is valid.
   // TODO(ericrk): Remove this once we've investigated further.
   // crbug.com/598286.
   CHECK(resource);
-  CHECK(resource->id());
+  ReleaseResource(resource->id());
+}
+
+void ResourcePool::ReleaseResource(ResourceId resource_id) {
+  // Ensure that the provided resource is valid.
+  // TODO(ericrk): Remove this once we've investigated further.
+  // crbug.com/598286.
+  CHECK(resource_id);
 
-  auto it = in_use_resources_.find(resource->id());
+  auto it = in_use_resources_.find(resource_id);
   if (it == in_use_resources_.end()) {
     // We should never hit this. Do some digging to try to determine the cause.
     // TODO(ericrk): Remove this once we've investigated further.
@@ -228,16 +242,16 @@ void ResourcePool::ReleaseResource(Resource* resource) {
     // list.
     auto found_busy = std::find_if(
         busy_resources_.begin(), busy_resources_.end(),
-        [resource](const std::unique_ptr<PoolResource>& busy_resource) {
-          return busy_resource->id() == resource->id();
+        [resource_id](const std::unique_ptr<PoolResource>& busy_resource) {
+          return busy_resource->id() == resource_id;
         });
     CHECK(found_busy == busy_resources_.end());
 
     // Also check if the resource exists in our unused resources list.
     auto found_unused = std::find_if(
         unused_resources_.begin(), unused_resources_.end(),
-        [resource](const std::unique_ptr<PoolResource>& pool_resource) {
-          return pool_resource->id() == resource->id();
+        [resource_id](const std::unique_ptr<PoolResource>& pool_resource) {
+          return pool_resource->id() == resource_id;
         });
     CHECK(found_unused == unused_resources_.end());