Delete idb_perf test.

tools/perf/test-info.json

 {
   "_description":"This file contains info about our performance test suites, used by the perf dashboard (http://chromeperf.appspot.com).",
   "blink_perf":{
     "description":"Runs all enabled benchmarks in third_party/WebKit/PerformanceTests/",
     "code":[
       "chrome/src/tools/perf/measurements/blink_perf.py",
       "third_party/WebKit/PerformanceTests/"
     ]
   },
   "browsermark": {
@@ skipping 56 matching lines @@
   "dromaeo.jslibtraverseprototype":{
     "description":"Traversing a DOM structure using the Prototype JavaScript Library."
   },
   "fast_path.key_mobile_sites":{
     "description":"Measures CPU usage on rendering critical threads. Both clock and CPU time is measured."
   },
    "html5gaming": {
     "description": "Impact HTML5 Gaming benchmark.\n\nTests one very specific use case: smooth running games rendered with the <canvas> element. The score for the HTML5-Benchmark takes the total time the browser spent rendering frames (formula is 1000000/(sqrt(totalTime) + lagTime * 0.1)). The benchmark automatically runs at a reasonable screen size. Final score is a indicator for the browser's ability to smoothly run HTML5 games.",
     "code": ["chrome/src/tools/perf/benchmark/html5gaming.py"]
   },
-  "idb_perf":{
-    "description":"Benchmarks for a variety of IndexedDB operations.",
-    "code":[
-      "chrome/src/chrome/test/perf/indexeddb_uitest.cc",
-      "chrome/src/chrome/test/data/indexeddb/perf_test.html"
-    ]
-  },
   "image_decoding.image_decoding_measurement ":{
     "description":"Milliseconds to decode a large image of various formats (gif, jpg, png, webp)."
   },
   "indexed_db":{
     "description":"Benchmarks for a variety of IndexedDB operations.",
     "code":[
       "chrome/src/chrome/test/data/indexeddb/perf_test.html"
     ]
   },
   "jsgamebench":{
@@ skipping 124 matching lines @@
     "description":"Measures warm startup time with a dirty profile.",
     "comment":"The same as startup.warm.blank_page, except for the user profile that's used. Set up in tools/build/scripts/master/factory/chromium_factory.py."
   },
   "sunspider":{
     "description":"Performance on the [SunSpider JavaScript benchmark](http://www.webkit.org/perf/sunspider/sunspider.html)"
   },
   "tab_switching.top_10":{
     "description":"This test records the MPArch.RWH_TabSwitchPaintDuration histogram, which is a measure of the time between when a tab was requested to be shown, and when first paint occurred. The script opens 10 pages in different tabs, waits for them to load, and then switches to each tab and records the metric. The pages were chosen from Alexa top ranking sites."
   }
 }