Move LayoutTests from platform/chromium/... to generic location

LayoutTests/platform/chromium/ContentShellTestExpectations

Index: LayoutTests/platform/chromium/ContentShellTestExpectations
diff --git a/LayoutTests/platform/chromium/ContentShellTestExpectations b/LayoutTests/platform/chromium/ContentShellTestExpectations
index 751ecf65f22d94c6fd5194f5f629f397c48093f6..02fa1b43eb7f62e0972324d9da13c2d2c160b3c9 100644
--- a/LayoutTests/platform/chromium/ContentShellTestExpectations
+++ b/LayoutTests/platform/chromium/ContentShellTestExpectations
@@ -7,7 +7,7 @@
 # -----------------------------------------------------------------
 crbug.com/178709 plugins/document-open.html [ Failure ]
 crbug.com/178719 plugins/reloadplugins-and-pages.html [ Timeout ]
-crbug.com/178724 platform/chromium/plugins/get-url-with-iframe-target-no-crash.html [ Timeout ]
+crbug.com/178724 plugins/get-url-with-iframe-target-no-crash.html [ Timeout ]
 crbug.com/178744 plugins/npruntime/browser-object-identity.html [ Failure ]
 crbug.com/178745 [ Debug ] plugins/geturlnotify-during-document-teardown.html [ Crash ]
 crbug.com/178745 [ Debug ] plugins/open-and-close-window-with-plugin.html [ Crash ]
@@ -17,7 +17,7 @@ crbug.com/222818 css3/filters/huge-region-composited.html [ Crash ]
 crbug.com/222896 virtual/softwarecompositing/layer-creation/spanOverlapsCanvas.html [ Crash ]
 crbug.com/222896 virtual/softwarecompositing/visibility/visibility-simple-canvas2d-layer.html [ Crash ]
 crbug.com/222896 virtual/softwarecompositing/overflow/overflow-hidden-canvas-layer.html [ Crash ]
-crbug.com/222906 platform/chromium/media/video-capture-preview.html [ Crash ]
+crbug.com/222906 media/video-capture-preview.html [ Crash ]
 crbug.com/223562 media/video-controls-captions.html [ Timeout ]
 crbug.com/223563 perf/accessibility-title-ui-element.html [ Timeout Pass Slow ]
 crbug.com/223565 http/tests/ssl/referer-301.html [ Timeout Pass Slow ]