Reland [DevTools] Added base SourceMap implementation on backend

third_party/WebKit/Source/core/inspector/v8/SourceMap.h

Index: third_party/WebKit/Source/core/inspector/v8/SourceMap.h
diff --git a/third_party/WebKit/Source/core/inspector/v8/SourceMap.h b/third_party/WebKit/Source/core/inspector/v8/SourceMap.h
new file mode 100644
index 0000000000000000000000000000000000000000..e7e5ca1dab50bcea4c960b04de9174839d7f5515
--- /dev/null
+++ b/third_party/WebKit/Source/core/inspector/v8/SourceMap.h
@@ -0,0 +1,55 @@
+// Copyright 2016 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.
+
+#ifndef SourceMap_h
+#define SourceMap_h
+
+#include "core/CoreExport.h"
+#include "wtf/Noncopyable.h"
+#include "wtf/OwnPtr.h"
+#include "wtf/PassOwnPtr.h"
+#include "wtf/text/WTFString.h"
+
+namespace blink {
+
+class JSONObject;
+
+class CORE_EXPORT SourceMap {
+    WTF_MAKE_NONCOPYABLE(SourceMap);

[sof, 2016/01/16 19:56:32]

Perhaps add USING_FAST_MALLOC(SourceMap) and on Entry?

+public:
+    class CORE_EXPORT Entry {
+        WTF_MAKE_NONCOPYABLE(Entry);
+    public:
+        int line;
+        int column;
+        String sourceURL;
+        int sourceLine;
+        int sourceColumn;
+
+        Entry(int line, int column, const String& sourceURL = String(), int sourceLine = 0, int sourceColumn = 0);

[sof, 2016/01/16 19:56:32]

nit: the sites constructing Entry objects would look tidier if you had a
create(...) factory method.

+        Entry()
+            : line(0)
+            , column(0)
+            , sourceLine(0)
+            , sourceColumn(0)
+        {
+        }
+    };
+
+    static PassOwnPtr<SourceMap> parse(const String& json, int offsetLine = 0, int offsetColumn = 0);
+
+    const Entry* findEntry(int line, int column);
+
+private:
+    SourceMap() { }
+
+    bool parseSection(PassRefPtr<JSONObject> sectionObject, int offsetLine, int offsetColumn);
+    bool parseMap(PassRefPtr<JSONObject> mapObject, int offsetLine, int offsetColumn);
+
+    Vector<OwnPtr<Entry>> m_mappings;
+};
+
+} // namespace blink
+
+#endif // SourceMap_h