DevTools: speed up DevToolsUIBindings::DispatchProtocolMessage

chrome/browser/devtools/devtools_ui_bindings.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/devtools/devtools_ui_bindings.h"
 
 #include "base/command_line.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/metrics/histogram.h"
@@ skipping 431 matching lines @@
   if (agent_host_.get())
     agent_host_->DispatchProtocolMessage(message);
 }
 
 // content::DevToolsAgentHostClient implementation --------------------------
 void DevToolsUIBindings::DispatchProtocolMessage(
     content::DevToolsAgentHost* agent_host, const std::string& message) {
   DCHECK(agent_host == agent_host_.get());
 
   if (message.length() < kMaxMessageChunkSize) {
-    base::StringValue message_value(message);
-    CallClientFunction("DevToolsAPI.dispatchMessage",
-                       &message_value, NULL, NULL);
+    base::string16 javascript = base::UTF8ToUTF16(
+        "DevToolsAPI.dispatchMessage(" + message + ");");

[yurys, 2014/12/05 13:03:30]

Content shell implementation should also be updated.

[loislo, 2014/12/05 13:11:26]

Done.

+    web_contents_->GetMainFrame()->ExecuteJavaScript(javascript);
     return;
   }
 
   base::FundamentalValue total_size(static_cast<int>(message.length()));
   for (size_t pos = 0; pos < message.length(); pos += kMaxMessageChunkSize) {
     base::StringValue message_value(message.substr(pos, kMaxMessageChunkSize));
     CallClientFunction("DevToolsAPI.dispatchMessageChunk",
                        &message_value, pos ? NULL : &total_size, NULL);
   }
 }
@@ skipping 436 matching lines @@
   if (frontend_loaded_)
     return;
   frontend_loaded_ = true;
 
   // Call delegate first - it seeds importants bit of information.
   delegate_->OnLoadCompleted();
 
   UpdateTheme();
   AddDevToolsExtensionsToClient();
 }