add JSONP option to output of skpdiff

experimental/skpdiff/SkDiffContext.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmap.h"
 #include "SkImageDecoder.h"
 #include "SkOSFile.h"
@@ skipping 129 matching lines @@
     }
 
     for (int entryIndex = 0; entryIndex < baselineEntries.count(); entryIndex++) {
         const char* baselineFilename = baselineEntries[entryIndex].c_str();
         const char* testFilename     = testEntries    [entryIndex].c_str();
 
         this->addDiff(baselineFilename, testFilename);
     }
 }
 
-void SkDiffContext::outputRecords(SkWStream& stream) {
+void SkDiffContext::outputRecords(SkWStream& stream, bool useJSONP) {
     DiffRecord* currentRecord = fRecords;
-    stream.writeText("{\n");
+    if (useJSONP) {
+        stream.writeText("var SkPDiffRecords = {\n");
+    }
+    else
+    {
+        stream.writeText("{\n");
+    }
     stream.writeText("    \"records\": [\n");
     while (NULL != currentRecord) {
         stream.writeText("        {\n");
 
             stream.writeText("            \"baselinePath\": \"");
             stream.writeText(currentRecord->fBaselinePath.c_str());
             stream.writeText("\",\n");
 
             stream.writeText("            \"testPath\": \"");
             stream.writeText(currentRecord->fTestPath.c_str());
@@ skipping 44 matching lines @@
 
         // JSON does not allow trailing commas
         if (NULL != currentRecord->fNext)
         {
             stream.writeText(",");
         }
         stream.writeText("\n");
         currentRecord = currentRecord->fNext;
     }
     stream.writeText("    ]\n");
-    stream.writeText("}\n");
+    if (useJSONP) {
+        stream.writeText("};\n");
+    }
+    else
+    {
+        stream.writeText("}\n");
+    }
 }