https://bugs.webkit.org/show_bug.cgi?id=126738

Reviewed by Dan Bernstein.

Use Frame& where the frame can never be null, avoid an extra hash lookup and
switch the m_progressItems map over to std::unique_ptr.

* inspector/InspectorInstrumentation.h:
(WebCore::InspectorInstrumentation::frameStartedLoading):
* loader/FrameLoader.cpp:
(WebCore::FrameLoader::FrameProgressTracker::~FrameProgressTracker):
(WebCore::FrameLoader::FrameProgressTracker::progressStarted):
(WebCore::FrameLoader::FrameProgressTracker::progressCompleted):
* loader/ProgressTracker.cpp:
(WebCore::ProgressTracker::progressStarted):
(WebCore::ProgressTracker::progressCompleted):
(WebCore::ProgressTracker::incrementProgress):
* loader/ProgressTracker.h:
* loader/ResourceLoadNotifier.cpp:
(WebCore::ResourceLoadNotifier::didReceiveData):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@161622 268f45cc-cd09-0410-ab3c-d52691b4dbfc