Indent media queries in CSS files for the DevTools.

Source/devtools/front_end/cm/cmdevtools.css

 .CodeMirror * {
   box-sizing: content-box;
 }
 
 .CodeMirror {
   line-height: 1.2em !important;
   height: 100% !important;
   background-color: transparent !important;
 }
 
@@ skipping 36 matching lines @@
   padding-left: 1px;
   height: 10px;
   line-height: 11px !important;
 }
 
 .cm-breakpoint.cm-breakpoint-conditional .CodeMirror-linenumber {
   -webkit-border-image: url(Images/breakpointConditional2.png) 1 4 1 1;
 }
 
 @media (-webkit-min-device-pixel-ratio: 1.5) {
-  .cm-breakpoint .CodeMirror-linenumber {
-    -webkit-border-image: url(Images/breakpoint2_2x.png) 2 8 2 2;
-  }
-  .cm-breakpoint.cm-breakpoint-conditional .CodeMirror-linenumber {
-    -webkit-border-image: url(Images/breakpointConditional2_2x.png) 2 8 2 2;
-  }
+.cm-breakpoint .CodeMirror-linenumber {
+  -webkit-border-image: url(Images/breakpoint2_2x.png) 2 8 2 2;
 }
+.cm-breakpoint.cm-breakpoint-conditional .CodeMirror-linenumber {
+  -webkit-border-image: url(Images/breakpointConditional2_2x.png) 2 8 2 2;
+}
+} /* media */
 
 .cm-breakpoint-disabled .CodeMirror-linenumber {
   opacity: 0.5;
 }
 
 .CodeMirror-matchingbracket {
   border-bottom: 1px solid black;
   color: #222 !important;
 }
 
@@ skipping 73 matching lines @@
 
 .CodeMirror .webkit-html-warning-message {
     background-color: rgb(100%, 62%, 42%);
     border: 2px solid rgb(100%, 52%, 21%);
 }
 
 .CodeMirror .webkit-html-error-message {
     background-color: rgb(100%, 42%, 42%);
     border: 2px solid rgb(100%, 31%, 31%);
 }