Original patch from issue 570048

chrome/common/extensions/api/extension_api.json

Index: chrome/common/extensions/api/extension_api.json
diff --git a/chrome/common/extensions/api/extension_api.json b/chrome/common/extensions/api/extension_api.json
index 9f6deff54b909009bd8186bcad9a5c34039179fc..6486b79e039ce6fdfd084f58b6685b723decf1e1 100644
--- a/chrome/common/extensions/api/extension_api.json
+++ b/chrome/common/extensions/api/extension_api.json
@@ -1187,6 +1187,64 @@
         ]
       },
       {
+        "name": "setZoomPercent",
+        "type": "function",
+        "description": "Set the zoom percentage.",
+        "parameters": [
+          {
+            "name": "tabId",
+            "type": "integer",
+            "minimum": 0,
+            "description": "The id of the tab to zoom."
+          },
+	  {
+	    "name": "zoomPercent",
+	    "type": "number",
+            "minimum": 0,
+	    "description": "The zoom percentage."
+	  },
+          {
+            "name": "callback",
+            "type": "function",
+            "optional": true,
+            "description": "Returns the resulting zoom percent, which may be different than requested.",
+            "parameters": [
+              {
+                "name": "zoomPercent",
+                "type": "number",
+                "description": "The current zoom percentage"
+              }
+	    ]
+          }
+        ]
+      },
+      {
+        "name": "getZoomPercent",
+        "type": "function",
+        "description": "Get the zoom percentage.",
+        "parameters": [
+          {
+            "name": "tabId",
+            "type": "integer",
+            "minimum": 0,
+            "description": "The id of the tab."
+          },
+          {
+            "name": "callback",
+	    "type": "function",
+            "description": "Returns the zoom percent.",
+            "parameters": [
+              {
+                "name": "zoomPercent",
+                "type": "number",
+                "minimum": 0,
+		"description": "The current zoom percentage"
+              }
+	    ]
+          }
+        ]
+      },
+      {
         "name": "remove",
         "type": "function",
         "description": "Closes a tab.",