DevTools: Fix Maximum call stack size exceeded error while retrieving CPU profile.

content/shell/browser/shell_devtools_frontend.cc

Index: content/shell/browser/shell_devtools_frontend.cc
diff --git a/content/shell/browser/shell_devtools_frontend.cc b/content/shell/browser/shell_devtools_frontend.cc
index 0dea6a16b5567df25149282e255cd437ed3a6145..ced3be73dc9b5585031a5988af1f48b13bb374c3 100644
--- a/content/shell/browser/shell_devtools_frontend.cc
+++ b/content/shell/browser/shell_devtools_frontend.cc
@@ -100,7 +100,8 @@ int ResponseWriter::Finish(const net::CompletionCallback& callback) {
 
 // This constant should be in sync with
 // the constant at devtools_ui_bindings.cc.
-const size_t kMaxMessageChunkSize = IPC::Channel::kMaximumMessageSize / 4;
+const size_t kMaxMessageChunkSize =
+    std::min(IPC::Channel::kMaximumMessageSize / 4, 20480ul);
 
 // static
 ShellDevToolsFrontend* ShellDevToolsFrontend::Show(
@@ -276,12 +277,13 @@ void ShellDevToolsFrontend::DispatchProtocolMessage(
     return;
   }
 
-  base::FundamentalValue total_size(static_cast<int>(message.length()));
+  size_t total_size = message.length();
   for (size_t pos = 0; pos < message.length(); pos += kMaxMessageChunkSize) {
     std::string param;
     base::JSONWriter::Write(
         base::StringValue(message.substr(pos, kMaxMessageChunkSize)), &param);
-    std::string code = "DevToolsAPI.dispatchMessageChunk(" + param + ");";
+    std::string code = "DevToolsAPI.dispatchMessageChunk(" + param + "," +
+                       std::to_string(pos ? 0 : total_size) + ");";
     base::string16 javascript = base::UTF8ToUTF16(code);
     web_contents()->GetMainFrame()->ExecuteJavaScriptForTests(javascript);
   }