Move visualbench to its own folder

BUG=skia:

Review URL: https://codereview.chromium.org/1216973002
diff --git a/gyp/visualbench.gyp b/gyp/visualbench.gyp
index 9164247..874b0aa 100644
--- a/gyp/visualbench.gyp
+++ b/gyp/visualbench.gyp
@@ -17,8 +17,8 @@
         '../src/images',
       ],
       'sources': [
-        '../tools/VisualBench.h',
-        '../tools/VisualBench.cpp',
+        '../tools/VisualBench/VisualBench.h',
+        '../tools/VisualBench/VisualBench.cpp',
       ],
       'dependencies': [
         'flags.gyp:flags_common',
diff --git a/platform_tools/android/gyp/dependencies.gypi b/platform_tools/android/gyp/dependencies.gypi
index 507a163..8be6836 100644
--- a/platform_tools/android/gyp/dependencies.gypi
+++ b/platform_tools/android/gyp/dependencies.gypi
@@ -317,6 +317,7 @@
         ],
         'include_dirs': [
           '../../../tools/timer/',
+          '../../../tools/VisualBench/',
         ],
         'sources': [
           '../visualbench/jni/SkOSWindow_AndroidNative.cpp',
diff --git a/tools/VisualBench.cpp b/tools/VisualBench/VisualBench.cpp
similarity index 100%
rename from tools/VisualBench.cpp
rename to tools/VisualBench/VisualBench.cpp
diff --git a/tools/VisualBench.h b/tools/VisualBench/VisualBench.h
similarity index 100%
rename from tools/VisualBench.h
rename to tools/VisualBench/VisualBench.h