Record received data in WebViewPlugin and replay it when loading the real plugin.

webkit/glue/plugins/webview_plugin.cc

Index: webkit/glue/plugins/webview_plugin.cc
diff --git a/webkit/glue/plugins/webview_plugin.cc b/webkit/glue/plugins/webview_plugin.cc
index d01c8529813df7fc7e0d654a7ad43c6a5b7d0e22..231bd37f6829ca9716adecc539fdf16923926d88 100644
--- a/webkit/glue/plugins/webview_plugin.cc
+++ b/webkit/glue/plugins/webview_plugin.cc
@@ -4,6 +4,7 @@
 
 #include "webkit/glue/plugins/webview_plugin.h"
 
+#include "base/histogram.h"
 #include "base/message_loop.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebCursorInfo.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebFrame.h"
@@ -52,9 +53,16 @@ WebViewPlugin::~WebViewPlugin() {
 }
 
 void WebViewPlugin::ReplayReceivedData(WebPlugin* plugin) {
-  if (response_.get()) {
-    plugin->didReceiveResponse(*response_);
-    plugin->didReceiveData(data_.c_str(), data_.length());
+  if (!response_.isNull()) {
+    plugin->didReceiveResponse(response_);
+    size_t total_bytes = 0;
+    for (std::list<std::string>::iterator it = data_.begin();
+        it != data_.end(); ++it) {
+      plugin->didReceiveData(it->c_str(), it->length());
+      total_bytes += it->length();
+    }
+    UMA_HISTOGRAM_MEMORY_KB("PluginDocument.Memory", (total_bytes / 1024));
+    UMA_HISTOGRAM_COUNTS("PluginDocument.NumChunks", data_.size());
   }
   if (finished_loading_) {
     plugin->didFinishLoading();
@@ -123,12 +131,12 @@ bool WebViewPlugin::handleInputEvent(const WebInputEvent& event,
 }
 
 void WebViewPlugin::didReceiveResponse(const WebURLResponse& response) {
-  DCHECK(!response_.get());
-  response_.reset(new WebURLResponse(response));
+  DCHECK(response_.isNull());
+  response_ = response;
 }
 
 void WebViewPlugin::didReceiveData(const char* data, int data_length) {
-  data_.append(data, data_length);
+  data_.push_back(std::string(data, data_length));
 }
 
 void WebViewPlugin::didFinishLoading() {