[DevTools] migrate RenderingAgent and EmulationAgent to new style

third_party/WebKit/Source/web/InspectorEmulationAgent.h

Index: third_party/WebKit/Source/web/InspectorEmulationAgent.h
diff --git a/third_party/WebKit/Source/web/InspectorEmulationAgent.h b/third_party/WebKit/Source/web/InspectorEmulationAgent.h
index 2046eb56c8fea4f380c725e55a6a29019685b408..20bc0fc3db7ebcd8d8e03d5b4df41b4fc029b8da 100644
--- a/third_party/WebKit/Source/web/InspectorEmulationAgent.h
+++ b/third_party/WebKit/Source/web/InspectorEmulationAgent.h
@@ -30,27 +30,20 @@ class InspectorEmulationAgent final
   ~InspectorEmulationAgent() override;
 
   // protocol::Dispatcher::EmulationCommandHandler implementation.
-  void forceViewport(ErrorString*,
-                     double in_x,
-                     double in_y,
-                     double in_scale) override;
-  void resetViewport(ErrorString*) override;
-  void resetPageScaleFactor(ErrorString*) override;
-  void setPageScaleFactor(ErrorString*, double in_pageScaleFactor) override;
-  void setScriptExecutionDisabled(ErrorString*, bool in_value) override;
-  void setTouchEmulationEnabled(
-      ErrorString*,
-      bool in_enabled,
-      const protocol::Maybe<String>& in_configuration) override;
-  void setEmulatedMedia(ErrorString*, const String& in_media) override;
-  void setCPUThrottlingRate(ErrorString*, double in_rate) override;
-  void setVirtualTimePolicy(
-      ErrorString*,
-      const String& in_policy,
-      const protocol::Maybe<int>& in_virtualTimeBudgetMs) override;
+  Response forceViewport(double x, double y, double scale) override;
+  Response resetViewport() override;
+  Response resetPageScaleFactor() override;
+  Response setPageScaleFactor(double) override;
+  Response setScriptExecutionDisabled(bool value) override;
+  Response setTouchEmulationEnabled(bool enabled,
+                                    Maybe<String> configuration) override;
+  Response setEmulatedMedia(const String&) override;
+  Response setCPUThrottlingRate(double) override;
+  Response setVirtualTimePolicy(const String& policy,
+                                Maybe<int> virtualTimeBudgetMs) override;
 
   // InspectorBaseAgent overrides.
-  void disable(ErrorString*) override;
+  Response disable() override;
   void restore() override;
 
   DECLARE_VIRTUAL_TRACE();