Make the extension API docs point out the minimum version that supports an API call.

chrome/common/extensions/docs/experimental.clipboard.html

Index: chrome/common/extensions/docs/experimental.clipboard.html
diff --git a/chrome/common/extensions/docs/experimental.clipboard.html b/chrome/common/extensions/docs/experimental.clipboard.html
index be6759ddae409d7ecc7f5f247155380b37eda85a..6990276ead95daf166812f714c26dd17b09a9d71 100644
--- a/chrome/common/extensions/docs/experimental.clipboard.html
+++ b/chrome/common/extensions/docs/experimental.clipboard.html
@@ -59,6 +59,15 @@
           <dd>
             Description of this parameter from the json schema.
           </dd>
+          <dd>
+            This parameter was added in version
+            <b><span></span></b>.
+            You must omit this parameter in earlier versions,
+            and you may omit it in any version.  If you require this
+            parameter, the manifest key
+            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
+            can ensure that your extension won't be run in an earlier browser version.
+          </dd>
 
           <!-- OBJECT PROPERTIES -->
           <dd>
@@ -356,6 +365,15 @@ generally indicates the tab is going away.
           <dd style="display: none; ">
             Description of this parameter from the json schema.
           </dd>
+          <dd style="display: none; ">
+            This parameter was added in version
+            <b><span></span></b>.
+            You must omit this parameter in earlier versions,
+            and you may omit it in any version.  If you require this
+            parameter, the manifest key
+            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
+            can ensure that your extension won't be run in an earlier browser version.
+          </dd>
 
           <!-- OBJECT PROPERTIES -->
           <dd style="display: none; ">
@@ -401,6 +419,15 @@ generally indicates the tab is going away.
           <dd style="display: none; ">
             Description of this parameter from the json schema.
           </dd>
+          <dd style="display: none; ">
+            This parameter was added in version
+            <b><span></span></b>.
+            You must omit this parameter in earlier versions,
+            and you may omit it in any version.  If you require this
+            parameter, the manifest key
+            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
+            can ensure that your extension won't be run in an earlier browser version.
+          </dd>
 
           <!-- OBJECT PROPERTIES -->
           <dd style="display: none; ">
@@ -448,6 +475,13 @@ generally indicates the tab is going away.
                   </div>
                 </div>
 
+                <!-- MIN_VERSION -->
+                <p style="display: none; ">
+                  This function was added in version <b><span></span></b>.
+                  If you require this function, the manifest key
+                  <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
+                  can ensure that your extension won't be run in an earlier browser version.
+                </p>
               </div> <!-- /description -->
 
             </div><div class="apiItem">
@@ -501,6 +535,15 @@ generally indicates the tab is going away.
           <dd style="display: none; ">
             Description of this parameter from the json schema.
           </dd>
+          <dd style="display: none; ">
+            This parameter was added in version
+            <b><span></span></b>.
+            You must omit this parameter in earlier versions,
+            and you may omit it in any version.  If you require this
+            parameter, the manifest key
+            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
+            can ensure that your extension won't be run in an earlier browser version.
+          </dd>
 
           <!-- OBJECT PROPERTIES -->
           <dd style="display: none; ">
@@ -546,6 +589,15 @@ generally indicates the tab is going away.
           <dd style="display: none; ">
             Description of this parameter from the json schema.
           </dd>
+          <dd style="display: none; ">
+            This parameter was added in version
+            <b><span></span></b>.
+            You must omit this parameter in earlier versions,
+            and you may omit it in any version.  If you require this
+            parameter, the manifest key
+            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
+            can ensure that your extension won't be run in an earlier browser version.
+          </dd>
 
           <!-- OBJECT PROPERTIES -->
           <dd style="display: none; ">
@@ -593,6 +645,13 @@ generally indicates the tab is going away.
                   </div>
                 </div>
 
+                <!-- MIN_VERSION -->
+                <p style="display: none; ">
+                  This function was added in version <b><span></span></b>.
+                  If you require this function, the manifest key
+                  <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
+                  can ensure that your extension won't be run in an earlier browser version.
+                </p>
               </div> <!-- /description -->
 
             </div><div class="apiItem">
@@ -646,6 +705,15 @@ generally indicates the tab is going away.
           <dd style="display: none; ">
             Description of this parameter from the json schema.
           </dd>
+          <dd style="display: none; ">
+            This parameter was added in version
+            <b><span></span></b>.
+            You must omit this parameter in earlier versions,
+            and you may omit it in any version.  If you require this
+            parameter, the manifest key
+            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
+            can ensure that your extension won't be run in an earlier browser version.
+          </dd>
 
           <!-- OBJECT PROPERTIES -->
           <dd style="display: none; ">
@@ -691,6 +759,15 @@ generally indicates the tab is going away.
           <dd style="display: none; ">
             Description of this parameter from the json schema.
           </dd>
+          <dd style="display: none; ">
+            This parameter was added in version
+            <b><span></span></b>.
+            You must omit this parameter in earlier versions,
+            and you may omit it in any version.  If you require this
+            parameter, the manifest key
+            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
+            can ensure that your extension won't be run in an earlier browser version.
+          </dd>
 
           <!-- OBJECT PROPERTIES -->
           <dd style="display: none; ">
@@ -738,6 +815,13 @@ generally indicates the tab is going away.
                   </div>
                 </div>
 
+                <!-- MIN_VERSION -->
+                <p style="display: none; ">
+                  This function was added in version <b><span></span></b>.
+                  If you require this function, the manifest key
+                  <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
+                  can ensure that your extension won't be run in an earlier browser version.
+                </p>
               </div> <!-- /description -->
 
             </div>  <!-- /apiItem -->