Adds enableVirtualTime and setVirtualTimePolicy To Emulation domain.

third_party/WebKit/Source/web/InspectorEmulationAgent.cpp

Index: third_party/WebKit/Source/web/InspectorEmulationAgent.cpp
diff --git a/third_party/WebKit/Source/web/InspectorEmulationAgent.cpp b/third_party/WebKit/Source/web/InspectorEmulationAgent.cpp
index ba8f31b71d66cf75371e9b2a69a84c72ef71fe77..279a96c5d4af8cf827f6fa27f7730905d5426789 100644
--- a/third_party/WebKit/Source/web/InspectorEmulationAgent.cpp
+++ b/third_party/WebKit/Source/web/InspectorEmulationAgent.cpp
@@ -9,6 +9,7 @@
 #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"
@@ -92,6 +93,33 @@ void InspectorEmulationAgent::setCPUThrottlingRate(ErrorString*, double throttli
     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);