DevTools: remove dependency of most agents on InspectorPageAgent

Source/core/inspector/InspectorResolver.cpp

Index: Source/core/inspector/InspectorResolver.cpp
diff --git a/Source/core/inspector/InspectorResolver.cpp b/Source/core/inspector/InspectorResolver.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..88a468cbd3bc1d781859b4e157e7238fc8e79f52
--- /dev/null
+++ b/Source/core/inspector/InspectorResolver.cpp
@@ -0,0 +1,39 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+#include "core/inspector/InspectorResolver.h"
+
+#include "core/dom/DOMNodeIds.h"
+#include "core/dom/Document.h"
+#include "core/dom/Node.h"
+#include "core/frame/LocalFrame.h"
+#include "core/inspector/InspectorIdentifiers.h"
+#include "core/loader/DocumentLoader.h"
+#include "wtf/text/WTFString.h"
+
+namespace blink {
+
+namespace InspectorResolver {
+
+Node* resolveNode(LocalFrame* inspectedFrame, int identifier)
+{
+    Node* node = DOMNodeIds::nodeForId(identifier);
+    LocalFrame* frame = node ? node->document().frame() : nullptr;
+    if (!frame || frame->instrumentingAgents() != inspectedFrame->instrumentingAgents())
+        return nullptr;
+    return node;
+}
+
+LocalFrame* resolveFrame(LocalFrame* inspectedFrame, const String& identifier)
+{
+    LocalFrame* frame = InspectorIdentifiers<LocalFrame>::lookup(identifier);
+    if (!frame || frame->instrumentingAgents() != inspectedFrame->instrumentingAgents())
+        return nullptr;
+    return frame;
+}
+
+} // namespace InspectorResolver
+
+} // namespace blink