Web Replay: capture and replay mouse events

Web Replay: capture and replay mouse events
https://bugs.webkit.org/show_bug.cgi?id=129395

Reviewed by Joseph Pecoraro.

.:

Create a manual test for capture/replay of mouse events.
Copy over the crypto-md5.js library from SunSpider.

* ManualTests/inspector/replay-mouse-events.html: Added.
* ManualTests/inspector/resources/crypto-md5.js: Added.

Source/WebCore:

Add support for capturing and replaying mouse inputs that come from WebKit2.
Hook up the UserInputBridge to session state changes in the ReplayController so
that the bridge knows when to capture or deny mouse inputs.

Test: ManualTests/inspector/replay-mouse-events.html

* platform/PlatformEvent.h: Give explicit storage types to Modifiers and Type enums
so they can be forward-declared.
* platform/PlatformMouseEvent.h: Give an explicit storage type to enum MouseButton.
Add operator== and operator!= for MouseButton to work around an MSVC bug.

* replay/ReplayController.cpp: Perform session state changes in a helper function, and
at the same time change the state of the page's user input bridge.
(WebCore::ReplayController::setSessionState):
(WebCore::ReplayController::startCapturing):
(WebCore::ReplayController::stopCapturing):
(WebCore::ReplayController::startPlayback):
(WebCore::ReplayController::cancelPlayback):

* replay/ReplayInputDispatchMethods.cpp: Add dispatch methods for new inputs.
(WebCore::HandleMouseMove::dispatch):
(WebCore::HandleMousePress::dispatch):
(WebCore::HandleMouseRelease::dispatch):

* replay/SerializationMethods.cpp: Add helper macros so that encode/decode methods look
symmetric with one data member per line. This helps reduce unintentional inconsistencies.
(JSC::EncodingTraits<PlatformMouseEvent>::encodeValue): Added.
(JSC::EncodingTraits<PlatformMouseEvent>::decodeValue): Added.
* replay/SerializationMethods.h:

* replay/UserInputBridge.cpp: Fill in the bridge method implementations for mouse
events, adding helpers and macros as necessary to reduce boilerplate.
(WebCore::UserInputBridge::activeCursor): Added.
(WebCore::UserInputBridge::handleMousePressEvent):
(WebCore::UserInputBridge::handleMouseReleaseEvent):
(WebCore::UserInputBridge::handleMouseMoveEvent):
(WebCore::UserInputBridge::handleMouseMoveOnScrollbarEvent):

* replay/UserInputBridge.h: Add a bridge state enum along with getters and setters.
The enum value controls whether the bridge should capture commands, deny non-synthetic
commands (from the user), or allow anything to pass (the default).
(WebCore::UserInputBridge::setState): Added.
(WebCore::UserInputBridge::state): Added.

* replay/WebInputs.json: Add inputs HandleMouseMove, HandleMousePress, HandleMouseRelease.
Add enum definitions for PlatformEvent::Type, PlatformEvent::Modifiers, and PlatformMouseEvent::MouseButton.
Alphabetize the existing data type definitions.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@166006 268f45cc-cd09-0410-ab3c-d52691b4dbfc