Move indexed db files from content/renderer to content/common.

content/common/child_thread.h

Index: content/common/child_thread.h
diff --git a/content/common/child_thread.h b/content/common/child_thread.h
index 220985a54a6140271221cedb6e1b873d324289ed..fcf5012b2e80a8d0b47cc49c0d31f6692113db33 100644
--- a/content/common/child_thread.h
+++ b/content/common/child_thread.h
@@ -24,6 +24,10 @@ class SyncChannel;
 class SyncMessageFilter;
 }
 
+namespace WebKit {
+class WebFrame;
+}
+
 // The main thread of a child process derives from this class.
 class CONTENT_EXPORT ChildThread : public IPC::Channel::Listener,
                                    public IPC::Message::Sender {
@@ -79,6 +83,8 @@ class CONTENT_EXPORT ChildThread : public IPC::Channel::Listener,
   // Returns the one child thread.
   static ChildThread* current();
 
+  virtual bool IsWebFrameValid(WebKit::WebFrame* frame);
+
  protected:
   friend class ChildProcess;