Add the ability to clear the shader disk cache.

content/browser/storage_partition_impl.h

Index: content/browser/storage_partition_impl.h
diff --git a/content/browser/storage_partition_impl.h b/content/browser/storage_partition_impl.h
index 07cea990e9b3d6e73d35d6aa601ea9d96dbbf753..58d74c5b58fb1c0e534c81d839ea51833bcf9044 100644
--- a/content/browser/storage_partition_impl.h
+++ b/content/browser/storage_partition_impl.h
@@ -34,6 +34,11 @@ class StoragePartitionImpl : public StoragePartition {
       const GURL& storage_origin,
       net::URLRequestContextGetter* request_context_getter) OVERRIDE;
   virtual void AsyncClearData(uint32 storage_mask) OVERRIDE;
+  virtual void AsyncClearDataBetween(
+      uint32 storage_mask,
+      const base::Time& begin,
+      const base::Time& end,
+      const base::Closure& callback) OVERRIDE;
 
  private:
   friend class StoragePartitionImplMap;