Breakdown memory usage by source file names in dmprof.

tools/deep_memory_profiler/policy.sourcefile.json

Index: tools/deep_memory_profiler/policy.sourcefile.json
diff --git a/tools/deep_memory_profiler/policy.l0.json b/tools/deep_memory_profiler/policy.sourcefile.json
similarity index 80%
copy from tools/deep_memory_profiler/policy.l0.json
copy to tools/deep_memory_profiler/policy.sourcefile.json
index c5351d2b9ad89cb1e2fcd5c5684a8d7467fa6cef..9d469781cecd5098fb9d6afe86a70f48a68abbe8 100644
--- a/tools/deep_memory_profiler/policy.l0.json
+++ b/tools/deep_memory_profiler/policy.sourcefile.json
@@ -15,7 +15,11 @@
     "no-bucket",
     "mmap-v8",
     "mmap-catch-all",
-    "tc-used-all",
+    "tc-v8",
+    "tc-skia",
+    "tc-webcore",
+    "tc-webkit",
+    "tc-catch-all",
     "tc-unused",
     "UNTIL_HERE_FOR_TOTAL",
     "total-exclude-profiler",
@@ -98,17 +102,37 @@
     },
     {
       "name": "mmap-v8",
-      "stacktrace": ".*v8::.*",
+      "stacksourcefile": ".*\\.\\./\\.\\./v8/src/.*",
       "allocator": "mmap"
     },
     {
       "name": "mmap-catch-all",
-      "stacktrace": ".*",
+      "stacksourcefile": ".*",
       "allocator": "mmap"
     },
     {
-      "name": "tc-used-all",
-      "stacktrace": ".*",
+      "name": "tc-v8",
+      "stacksourcefile": ".*\\.\\./\\.\\./v8/src/.*",
+      "allocator": "malloc"
+    },
+    {
+      "name": "tc-skia",
+      "stacksourcefile": ".*\\.\\./\\.\\./third_party/skia/src/.*",
+      "allocator": "malloc"
+    },
+    {
+      "name": "tc-webcore",
+      "stacksourcefile": ".*\\.\\./\\.\\./third_party/WebKit/Source/WebCore/.*",
+      "allocator": "malloc"
+    },
+    {
+      "name": "tc-webkit",
+      "stacksourcefile": ".*\\.\\./\\.\\./third_party/WebKit/Source/.*",
+      "allocator": "malloc"
+    },
+    {
+      "name": "tc-catch-all",
+      "stacksourcefile": ".*",
       "allocator": "malloc"
     },
     {