Adds enableVirtualTime and setVirtualTimePolicy To Emulation domain.

third_party/WebKit/Source/web/InspectorEmulationAgent.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "web/InspectorEmulationAgent.h"
 
 #include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/Settings.h"
 #include "core/page/Page.h"
 #include "platform/geometry/DoubleRect.h"
+#include "public/platform/WebViewScheduler.h"
 #include "web/DevToolsEmulator.h"
 #include "web/WebLocalFrameImpl.h"
 #include "web/WebViewImpl.h"
 
 namespace blink {
 
 namespace EmulationAgentState {
 static const char scriptExecutionDisabled[] = "scriptExecutionDisabled";
 static const char touchEventEmulationEnabled[] = "touchEventEmulationEnabled";
 static const char emulatedMedia[] = "emulatedMedia";
@@ skipping 63 matching lines @@
 {
     m_state->setString(EmulationAgentState::emulatedMedia, media);
     webViewImpl()->page()->settings().setMediaTypeOverride(media);
 }
 
 void InspectorEmulationAgent::setCPUThrottlingRate(ErrorString*, double throttlingRate)
 {
     m_client->setCPUThrottlingRate(throttlingRate);
 }
 
+void InspectorEmulationAgent::enableVirtualTime(ErrorString*)
+{
+    for (WebLocalFrame* frame = m_webLocalFrameImpl; frame; frame = frame->traverseNextLocal(false)) {

[dgozman, 2016/07/05 15:30:35]

We have InspectedFrames class, which allows to iterate over frames being
inspected by this agent. Let's pass it in constructor and use here.

[alex clarke (OOO till 29th), 2016/07/05 16:51:23]

I tried that but the problem is we need to get hold of the WebViewScheduler
which is exposed on WebView but not FrameView (the InspectedFrames iterates over
LocalFrame*). 

[dcheng, 2016/07/06 01:09:48]

I don't think we should be introducing new usages of traverseNextLocal. It was a
bit of a hack that we added to make find-in-page not crash as much when it
didn't fully support OOPI. I don't fully understand the requirements here, but
I'm happy to schedule a short meeting so we can figure out the right path
forward.

[alex clarke (OOO till 29th), 2016/07/06 09:23:25]

I didn't realize it was depreciated, good to know.

Thinking about it now, I don't know why I thought it was necessary to iterate
over all frames. They all have the same WebViewScheduler...  We can safely
remove that :)

+        frame->view()->scheduler()->enableVirtualTime();
+    }
+}
+
+namespace {
+void setVirtualTimePolicyForEachFrame(WebLocalFrameImpl* mainFrame, WebViewScheduler::VirtualTimePolicy policy)
+{
+    for (WebLocalFrame* frame = mainFrame; frame; frame = frame->traverseNextLocal(false)) {
+        frame->view()->scheduler()->setVirtualTimePolicy(policy);
+    }
+}
+}
+
+void InspectorEmulationAgent::setVirtualTimePolicy(ErrorString*, const String& in_policy)
+{
+    if (protocol::Emulation::VirtualTimePolicyEnum::Advance == in_policy) {
+        setVirtualTimePolicyForEachFrame(m_webLocalFrameImpl, WebViewScheduler::VirtualTimePolicy::ADVANCE);
+    } else if (protocol::Emulation::VirtualTimePolicyEnum::Pause == in_policy) {
+        setVirtualTimePolicyForEachFrame(m_webLocalFrameImpl, WebViewScheduler::VirtualTimePolicy::PAUSE);
+    } else if (protocol::Emulation::VirtualTimePolicyEnum::PauseIfNetworkFetchesPending == in_policy) {
+        setVirtualTimePolicyForEachFrame(m_webLocalFrameImpl, WebViewScheduler::VirtualTimePolicy::PAUSE_IF_NETWORK_FETCHES_PENDING);
+    }
+}
+
 DEFINE_TRACE(InspectorEmulationAgent)
 {
     visitor->trace(m_webLocalFrameImpl);
     InspectorBaseAgent::trace(visitor);
 }
 
 } // namespace blink