cc: Add frame data to LTHI tracing

cc/quads/shared_quad_state.cc

Index: cc/quads/shared_quad_state.cc
diff --git a/cc/quads/shared_quad_state.cc b/cc/quads/shared_quad_state.cc
index 7bfb2b440f378b9333383add131a297eabb71fa3..228bff75aeac39b98e5a576f76a66a939456b504 100644
--- a/cc/quads/shared_quad_state.cc
+++ b/cc/quads/shared_quad_state.cc
@@ -4,11 +4,26 @@
 
 #include "cc/quads/shared_quad_state.h"
 
+#include "base/values.h"
+#include "cc/base/math_util.h"
+#include "cc/debug/traced_value.h"
+
 namespace cc {
 
 SharedQuadState::SharedQuadState() : is_clipped(false), opacity(0.f) {}
 
-SharedQuadState::~SharedQuadState() {}
+SharedQuadState::~SharedQuadState() {
+  // Snapshot was created in cc.debug category, but only if cc.debug.quads is on
+  // as well.
+  bool enabled;
+  TRACE_EVENT_CATEGORY_GROUP_ENABLED(
+      TRACE_DISABLED_BY_DEFAULT("cc.debug.quads"), &enabled);
+  if (enabled) {
+    TRACE_EVENT_OBJECT_DELETED_WITH_ID(TRACE_DISABLED_BY_DEFAULT("cc.debug"),
+                                       "cc::SharedQuadState",
+                                       this);
+  }
+}
 
 scoped_ptr<SharedQuadState> SharedQuadState::Create() {
   return make_scoped_ptr(new SharedQuadState);
@@ -33,4 +48,20 @@ void SharedQuadState::SetAll(
   this->opacity = opacity;
 }
 
+scoped_ptr<base::Value> SharedQuadState::AsValue() const {
+  scoped_ptr<base::DictionaryValue> value(new base::DictionaryValue());
+  value->Set("transform",
+             MathUtil::AsValue(content_to_target_transform).release());
+  value->Set("layer_content_bounds",
+             MathUtil::AsValue(content_bounds).release());
+  value->Set("layer_visible_content_rect",
+             MathUtil::AsValue(visible_content_rect).release());
+  value->SetBoolean("is_clipped", is_clipped);
+  value->Set("clip_rect", MathUtil::AsValue(clip_rect).release());
+  value->SetDouble("opacity", opacity);
+  TracedValue::MakeDictIntoImplicitSnapshot(
+      value.get(), "cc::SharedQuadState", this);
+  return value.PassAs<base::Value>();
+}
+
 }  // namespace cc