[Storage] Consoliation of BlobItems with small size

content/child/webblobregistry_impl.h

Index: content/child/webblobregistry_impl.h
diff --git a/content/child/webblobregistry_impl.h b/content/child/webblobregistry_impl.h
index e438baa2bdf96256a8f96e990d0207402d1ec33a..dc6712869c7fcaf3088d40e288014b5f404e2977 100644
--- a/content/child/webblobregistry_impl.h
+++ b/content/child/webblobregistry_impl.h
@@ -6,6 +6,7 @@
 #define CONTENT_CHILD_WEBBLOBREGISTRY_IMPL_H_
 
 #include <string>
+#include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "third_party/WebKit/public/platform/WebBlobRegistry.h"
@@ -14,6 +15,10 @@ namespace blink {
 class WebThreadSafeData;
 }  // namespace blink
 
+namespace storage {
+class DataElement;
+}
+
 namespace content {
 class ThreadSafeSender;
 
@@ -43,8 +48,19 @@ class WebBlobRegistryImpl : public blink::WebBlobRegistry {
   virtual void unregisterStreamURL(const blink::WebURL& url);
 
  private:
-  void SendDataForBlob(const std::string& uuid_str,
-                       const blink::WebThreadSafeData& data);
+  // Sends the data in the buffer as a blob item, then resets the buffer size.
+  void FlushBlobItemBuffer(const std::string& uuid_str,
+                           storage::DataElement* data_buffer) const;
+
+  // Adds the item to the consolidating buffer, flushing the buffer if needed.
+  // If the item is too big for the buffer, it is sent as Sync messages in
+  // shared memory instead.
+  void BufferBlobData(const std::string& uuid_str,
+                      const blink::WebThreadSafeData& data,
+                      storage::DataElement* data_buffer);
+  // Sends data that is larger than the threshold.
+  void SendOversizedDataForBlob(const std::string& uuid_str,
+                                const blink::WebThreadSafeData& data);
 
   scoped_refptr<ThreadSafeSender> sender_;
 };