Option to not execute search until instructed (e.g. for large pages)

[Trinition]

Issue Description

When Chrome opens a very large piece of content (e.g. several MB log file) and you start to type our search expression, the delay of executing a search after every key press as the full expression is incrementally types is problematic. An option to delay searching for some time (to allow a full expression to be entered), or until the user instructs they are now complete (e.g. ENTER / "go" / etc.)

Steps to Reproduce

• Open a large page
• Start typing a search expression, one character at a time (e.g.: i-n-f-o-...)
• Note the page is searched after each keypress