Apply snake_case to InstanceCountersMemoryDumpProvider.cc

InstanceCountersMemoryDumpProvider.cc was not renamed as
snake case with no reason.

Bug: 768828
Change-Id: Icf323d551341647dd7d3beb637f949f3053c95a5
Reviewed-on: https://chromium-review.googlesource.com/1235354Reviewed-by: Kent Tamura <tkent@chromium.org>
Commit-Queue: Amos Lim <eui-sang.lim@samsung.com>
Cr-Commit-Position: refs/heads/master@{#592686}

third_party/blink/renderer/platform/BUILD.gn

@@ -269,7 +269,6 @@ jumbo_component("platform") {
   output_name = "blink_platform"
 
   sources = [
-    "InstanceCountersMemoryDumpProvider.cc",
     "animation/animation_translation_util.cc",
     "animation/animation_translation_util.h",
     "animation/animation_utilities.h",
@@ -1145,6 +1144,7 @@ jumbo_component("platform") {
     "image-encoders/image_encoder_utils.h",
     "instance_counters.cc",
     "instance_counters.h",
+    "instance_counters_memory_dump_provider.cc",
     "instance_counters_memory_dump_provider.h",
     "json/json_parser.cc",
     "json/json_parser.h",