Move allocate instance id to chrome/.

chrome/browser/extensions/api/webview/webview_api.h

Index: chrome/browser/extensions/api/webview/webview_api.h
diff --git a/chrome/browser/extensions/api/webview/webview_api.h b/chrome/browser/extensions/api/webview/webview_api.h
index e0b9efe79596f87a331ea0be42f428759de9cd28..864086cb6a861980ea2d05e60aa025233b6740d7 100644
--- a/chrome/browser/extensions/api/webview/webview_api.h
+++ b/chrome/browser/extensions/api/webview/webview_api.h
@@ -98,6 +98,19 @@ class WebviewContextMenusRemoveAllFunction : public AsyncExtensionFunction {
   DISALLOW_COPY_AND_ASSIGN(WebviewContextMenusRemoveAllFunction);
 };
 
+class WebviewNavigateFunction : public WebviewExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("webview.navigate", WEBVIEW_NAVIGATE);
+  WebviewNavigateFunction() {}
+ protected:
+  virtual ~WebviewNavigateFunction() {}
+ private:
+  // WebviewExtensionFunction implementation.
+  virtual bool RunAsyncSafe(WebViewGuest* guest) OVERRIDE;
+
+  DISALLOW_COPY_AND_ASSIGN(WebviewNavigateFunction);
+};
+
 class WebviewClearDataFunction : public WebviewExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("webview.clearData", WEBVIEW_CLEARDATA);