compositor-worker: Initialize CW machinery plumbing to compositor and fire CW rAF callbacks.

third_party/WebKit/Source/platform/graphics/CompositorMutatorClient.cpp

Index: third_party/WebKit/Source/platform/graphics/CompositorMutatorClient.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/CompositorMutatorClient.cpp b/third_party/WebKit/Source/platform/graphics/CompositorMutatorClient.cpp
index d072e0bf3f1d4c235a4a967d3c67c7118cc84b2e..84ad1b0c3adafd0a269af67b8322fde43aa7bbde 100644
--- a/third_party/WebKit/Source/platform/graphics/CompositorMutatorClient.cpp
+++ b/third_party/WebKit/Source/platform/graphics/CompositorMutatorClient.cpp
@@ -9,11 +9,14 @@
 #include "platform/TraceEvent.h"
 #include "platform/graphics/CompositorMutation.h"
 #include "platform/graphics/CompositorMutationsTarget.h"
+#include "platform/graphics/CompositorMutator.h"
 
 namespace blink {
 
-CompositorMutatorClient::CompositorMutatorClient(CompositorMutationsTarget* mutationsTarget)
-    : m_mutationsTarget(mutationsTarget)
+CompositorMutatorClient::CompositorMutatorClient(CompositorMutator* mutator, CompositorMutationsTarget* mutationsTarget)
+    : m_client(nullptr)
+    , m_mutationsTarget(mutationsTarget)
+    , m_mutator(mutator)
     , m_mutations(nullptr)
 {
     TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("compositor-worker"), "CompositorMutatorClient::CompositorMutatorClient");
@@ -24,6 +27,24 @@ CompositorMutatorClient::~CompositorMutatorClient()
     TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("compositor-worker"), "CompositorMutatorClient::~CompositorMutatorClient");
 }
 
+bool CompositorMutatorClient::Mutate(
+    base::TimeTicks monotonicTime)
+{
+    TRACE_EVENT0("compositor-worker", "CompositorMutatorClient::Mutate");
+    double monotonicTimeNow = (monotonicTime - base::TimeTicks()).InSecondsF();
+    if (!m_mutations)
+        m_mutations = adoptPtr(new CompositorMutations);
+    bool shouldReinvoke = m_mutator->mutate(monotonicTimeNow);
+    return shouldReinvoke;
+}
+
+void CompositorMutatorClient::SetClient(cc::LayerTreeMutatorClient* client)
+{
+    TRACE_EVENT0("compositor-worker", "CompositorMutatorClient::SetClient");
+    m_client = client;
+    setNeedsMutate();
+}
+
 base::Closure CompositorMutatorClient::TakeMutations()
 {
     TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("compositor-worker"), "CompositorMutatorClient::TakeMutations");
@@ -35,6 +56,12 @@ base::Closure CompositorMutatorClient::TakeMutations()
         base::Owned(m_mutations.leakPtr()));
 }
 
+void CompositorMutatorClient::setNeedsMutate()
+{
+    TRACE_EVENT0("compositor-worker", "CompositorMutatorClient::setNeedsMutate");
+    m_client->SetNeedsMutate();
+}
+
 void CompositorMutatorClient::setMutationsForTesting(PassOwnPtr<CompositorMutations> mutations)
 {
     m_mutations = std::move(mutations);