DevTools: remove the 'forced' attribute from the AgentHostClosed in DevToolsAgentHost.

Bug: 
Change-Id: I7acc2283c1fac5bc57f6b1bc9c4e2ec823453c3e
TBR: for API change upstream
Reviewed-on: https://chromium-review.googlesource.com/745301
Commit-Queue: Pavel Feldman <[email protected]>
Reviewed-by: Andrey Kosyakov <[email protected]>
Cr-Commit-Position: refs/heads/master@{#512936}
diff --git a/content/shell/browser/shell_devtools_bindings.h b/content/shell/browser/shell_devtools_bindings.h
index 924ab60..01e5197 100644
--- a/content/shell/browser/shell_devtools_bindings.h
+++ b/content/shell/browser/shell_devtools_bindings.h
@@ -55,7 +55,7 @@
 
  protected:
   // content::DevToolsAgentHostClient implementation.
-  void AgentHostClosed(DevToolsAgentHost* agent_host, bool replaced) override;
+  void AgentHostClosed(DevToolsAgentHost* agent_host) override;
   void DispatchProtocolMessage(DevToolsAgentHost* agent_host,
                                const std::string& message) override;