[5/N] Add DIR_METADATA files to directories under //content

Generate DIR_METADATA files and remove metadata from OWNERS
files for directories under //content.

R=falken@chromium.org

Bug: 1113033
Change-Id: Ie85022f566d7017f3d1950f93e2192ce62f4f000
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2544850
Commit-Queue: Josip Sokcevic <sokcevic@google.com>
Auto-Submit: Josip Sokcevic <sokcevic@google.com>
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#828586}

content/renderer/loader/DIR_METADATA

+monorail {
+  component: "Blink>Loader"
+}
+team_email: "loading-dev@chromium.org"

content/renderer/loader/OWNERS

 yhirano@chromium.org
-# COMPONENT: Blink>Loader
-# TEAM: loading-dev@chromium.org

content/renderer/media/DIR_METADATA

+monorail {
+  component: "Internals>Media"
+}

content/renderer/media/OWNERS

@@ -11,5 +11,3 @@ olka@chromium.org
 
 # Original (legacy) owner.
 emircan@chromium.org
-
-# COMPONENT: Internals>Media

content/renderer/media/gpu/DIR_METADATA

+monorail {
+  component: "Internals>GPU>Video"
+}

content/renderer/media/gpu/OWNERS

 file://media/gpu/OWNERS
-
-# COMPONENT: Internals>GPU>Video

content/renderer/pepper/DIR_METADATA

+monorail {
+  component: "Internals>Plugins>Pepper"
+}
+team_email: "pepper-dev@chromium.org"

content/renderer/pepper/OWNERS

@@ -8,6 +8,3 @@ per-file usb_key_code_*=wez@chromium.org
 # WebSocket
 per-file *websocket*=ricea@chromium.org
 per-file *websocket*=yhirano@chromium.org
-
-# COMPONENT: Internals>Plugins>Pepper
-# TEAM: pepper-dev@chromium.org

content/renderer/service_worker/DIR_METADATA

+monorail {
+  component: "Blink>ServiceWorker"
+}
+team_email: "worker-dev@chromium.org"

content/renderer/service_worker/OWNERS

@@ -2,6 +2,3 @@ file://content/browser/service_worker/OWNERS
 
 per-file *_type_converter*.*=set noparent
 per-file *_type_converter*.*=file://ipc/SECURITY_OWNERS
-
-# TEAM: worker-dev@chromium.org
-# COMPONENT: Blink>ServiceWorker

content/renderer/worker/DIR_METADATA

+monorail {
+  component: "Blink>Workers"
+}
+team_email: "worker-dev@chromium.org"

content/renderer/worker/OWNERS

 falken@chromium.org
 horo@chromium.org
 nhiroki@chromium.org
-
-# TEAM: worker-dev@chromium.org
-# COMPONENT: Blink>Workers

content/services/isolated_xr_device/DIR_METADATA

+monorail {
+  component: "Internals>XR"
+}
+team_email: "xr-dev@chromium.org"

content/services/isolated_xr_device/OWNERS

 alcooper@chromium.org
 klausw@chromium.org
-
-# TEAM: xr-dev@chromium.org
-# COMPONENT: Internals>XR

content/shell/DIR_METADATA

+monorail {
+  component: "Test"
+}

content/shell/OWNERS

@@ -2,5 +2,3 @@ mkwst@chromium.org
 peter@chromium.org
 danakj@chromium.org
 
-# COMPONENT: Test
-

content/shell/android/DIR_METADATA

+monorail {
+  component: "Content>Core"
+}
+team_email: "chromium-reviews@chromium.org"

content/shell/android/OWNERS

@@ -2,6 +2,3 @@ agrieve@chromium.org
 boliu@chromium.org
 tedchoc@chromium.org
 yfriedman@chromium.org
-
-# COMPONENT: Content>Core
-# TEAM: chromium-reviews@chromium.org

content/shell/fuchsia/DIR_METADATA

+monorail {
+  component: "Fuchsia"
+}
+team_email: "cr-fuchsia@chromium.org"
+os: FUCHSIA

content/shell/fuchsia/OWNERS

 file://build/fuchsia/OWNERS
-# COMPONENT: Fuchsia
-# OS: Fuchsia
-# TEAM: cr-fuchsia@chromium.org
 
 per-file *.cmx=set noparent
 per-file *.cmx=file://fuchsia/SECURITY_OWNERS

content/test/data/accessibility/DIR_METADATA

+monorail {
+  component: "Internals>Accessibility"
+}
+team_email: "chromium-accessibility@chromium.org"

content/test/data/accessibility/OWNERS

 file://ui/accessibility/OWNERS
-
-# TEAM: chromium-accessibility@chromium.org
-# COMPONENT: Internals>Accessibility

content/test/gpu/DIR_METADATA

+monorail {
+  component: "Internals>GPU>Internals"
+}
+team_email: "graphics-dev@chromium.org"

content/test/gpu/OWNERS

@@ -7,6 +7,3 @@ zmo@chromium.org
 
 # Emeritus:
 # dtu@chromium.org
-
-# COMPONENT: Internals>GPU>Internals
-# TEAM: graphics-dev@chromium.org