[DevTools] Switch from separate sendMessageToBackend method to using embedder.

Source/web/InspectorFrontendClientImpl.cpp

Index: Source/web/InspectorFrontendClientImpl.cpp
diff --git a/Source/web/InspectorFrontendClientImpl.cpp b/Source/web/InspectorFrontendClientImpl.cpp
index b8c312d3c0f4bcbe0799cda7bf06722044686d18..f3965d03fe935e0e97b25956474f7ccd76162e2c 100644
--- a/Source/web/InspectorFrontendClientImpl.cpp
+++ b/Source/web/InspectorFrontendClientImpl.cpp
@@ -133,6 +133,7 @@ void InspectorFrontendClientImpl::windowObjectCleared()
             "     ['resetZoom', 0],"
             "     ['save', 3],"
             "     ['searchInPath', 3],"
+            "     ['sendMessageToBrowser', 1],"
             "     ['setDeviceCountUpdatesEnabled', 1],"
             "     ['setDevicesUpdatesEnabled', 1],"
             "     ['setWhitelistedShortcuts', 1],"
@@ -143,6 +144,12 @@ void InspectorFrontendClientImpl::windowObjectCleared()
             "     ['zoomIn', 0],"
             "     ['zoomOut', 0]]);"
             ""
+            "" // Support for legacy front-ends (<M38). Do not add items here.
+            "InspectorFrontendHost.sendMessageToBackend = function(message)"
+            "{"
+            "    InspectorFrontendHost.sendMessageToBrowser(message);"
+            "};"
+            ""
             "" // Support for legacy front-ends (<M34). Do not add items here.
             "InspectorFrontendHost.requestSetDockSide = function(dockSide)"
             "{"
@@ -162,11 +169,6 @@ void InspectorFrontendClientImpl::windowObjectCleared()
     }
 }
 
-void InspectorFrontendClientImpl::sendMessageToBackend(const String& message)
-{
-    m_client->sendMessageToBackend(message);
-}
-
 void InspectorFrontendClientImpl::sendMessageToEmbedder(const String& message)
 {
     m_client->sendMessageToEmbedder(message);