Convert RuntimeEnabledFeatures.in config file to JSON format.

third_party/WebKit/Source/bindings/IDLExtendedAttributes.md

Index: third_party/WebKit/Source/bindings/IDLExtendedAttributes.md
diff --git a/third_party/WebKit/Source/bindings/IDLExtendedAttributes.md b/third_party/WebKit/Source/bindings/IDLExtendedAttributes.md
index d0d4dc4a682a990a8a41e72eab0fcc19e0ebc59f..300c31c6df62c33e41588702c86c7e5413f85e54 100644
--- a/third_party/WebKit/Source/bindings/IDLExtendedAttributes.md
+++ b/third_party/WebKit/Source/bindings/IDLExtendedAttributes.md
@@ -1023,7 +1023,7 @@ Usage: `[NotEnumerable]` can be specified on methods and attributes
 
 Summary: Like `[RuntimeEnabled]`, it controls at runtime whether bindings are exposed, but uses a different mechanism for enabling experimental features.
 
-Usage: `[OriginTrialEnabled=FeatureName]`. FeatureName must be included in [RuntimeEnabledFeatures.in](https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit/Source/platform/RuntimeEnabledFeatures.in), and is the same value that would be used with `[RuntimeEnabled]`.
+Usage: `[OriginTrialEnabled=FeatureName]`. FeatureName must be included in [RuntimeEnabledFeatures.json5](https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit/Source/platform/RuntimeEnabledFeatures.json5), and is the same value that would be used with `[RuntimeEnabled]`.
 
 ```webidl
 [
@@ -1035,7 +1035,7 @@ When there is an active origin trial for the current execution context, the feat
 
 `[OriginTrialEnabled]` has similar semantics to `[RuntimeEnabled]`, and is intended as a drop-in replacement. For example, `[OriginTrialEnabled]` _cannot_ be applied to arguments, see `[RuntimeEnabled]` for reasoning. The key implementation difference is that `[OriginTrialEnabled]` wraps the generated code with `if (OriginTrials::FeatureNameEnabled(...)) { ...code... }`.
 
-For more information, see [RuntimeEnabledFeatures](https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit/Source/platform/RuntimeEnabledFeatures.in) and [OriginTrialContext](https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit/Source/core/origin_trials/OriginTrialContext.h).
+For more information, see [RuntimeEnabledFeatures](https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit/Source/platform/RuntimeEnabledFeatures.json5) and [OriginTrialContext](https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit/Source/core/origin_trials/OriginTrialContext.h).
 
 *** note
 **FIXME:** Currently, `[OriginTrialEnabled]` can only be applied to interfaces, attributes, and constants. Methods (including those generated by `iterable`, `setlike`, `maplike`, `serializer` and `stringifier`) are not supported. See [Bug 621641](https://crbug.com/621641).
@@ -1230,7 +1230,7 @@ If there is no match, the empty string will be returned. As required by the spec
 
 Summary: `[RuntimeEnabled]` wraps the generated code with `if (RuntimeEnabledFeatures::FeatureNameEnabled) { ...code... }`.
 
-Usage: `[RuntimeEnabled=FeatureName]`. FeatureName must be included in [RuntimeEnabledFeatures.in](https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit/Source/platform/RuntimeEnabledFeatures.in).
+Usage: `[RuntimeEnabled=FeatureName]`. FeatureName must be included in [RuntimeEnabledFeatures.in](https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit/Source/platform/RuntimeEnabledFeatures.json5).
 
 ```webidl
 [
@@ -1254,7 +1254,7 @@ foo(long x);
 [RuntimeEnabled=FeatureName] foo(long x, long y);
 ```
 
-For more information, see [RuntimeEnabledFeatures](https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit/Source/platform/RuntimeEnabledFeatures.in).
+For more information, see [RuntimeEnabledFeatures](https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit/Source/platform/RuntimeEnabledFeatures.json5).
 
 ### [SaveSameObject] _(a)_