Implement installation of the Chrome App Host.

chrome/installer/util/installation_validator.h

Index: chrome/installer/util/installation_validator.h
diff --git a/chrome/installer/util/installation_validator.h b/chrome/installer/util/installation_validator.h
index 519718e68e8b76f89061a2690e689acfc8f0a879..191828fe5f7780745d3465aa5c9e09b1d72617bc 100644
--- a/chrome/installer/util/installation_validator.h
+++ b/chrome/installer/util/installation_validator.h
@@ -37,6 +37,7 @@ class InstallationValidator {
       CHROME_FRAME_SINGLE     = 0x04,
       CHROME_FRAME_MULTI      = 0x08,
       CHROME_FRAME_READY_MODE = 0x10,
+      CHROME_APP_HOST         = 0x20,
     };
   };  // class ProductBits
 
@@ -59,6 +60,23 @@ class InstallationValidator {
         ProductBits::CHROME_FRAME_MULTI | ProductBits::CHROME_MULTI,
     CHROME_FRAME_READY_MODE_CHROME_MULTI =
         ProductBits::CHROME_FRAME_READY_MODE | ProductBits::CHROME_MULTI,
+    CHROME_APP_HOST =
+        ProductBits::CHROME_APP_HOST,
+    CHROME_APP_HOST_CHROME_FRAME_SINGLE =
+        ProductBits::CHROME_APP_HOST | ProductBits::CHROME_FRAME_SINGLE,
+    CHROME_APP_HOST_CHROME_FRAME_SINGLE_CHROME_MULTI =
+        ProductBits::CHROME_APP_HOST | ProductBits::CHROME_FRAME_SINGLE |
+        ProductBits::CHROME_MULTI,
+    CHROME_APP_HOST_CHROME_FRAME_MULTI =
+        ProductBits::CHROME_APP_HOST | ProductBits::CHROME_FRAME_MULTI,
+    CHROME_APP_HOST_CHROME_FRAME_MULTI_CHROME_MULTI =
+        ProductBits::CHROME_APP_HOST | ProductBits::CHROME_FRAME_MULTI |
+        ProductBits::CHROME_MULTI,
+    CHROME_APP_HOST_CHROME_MULTI =
+        ProductBits::CHROME_APP_HOST | ProductBits::CHROME_MULTI,
+    CHROME_APP_HOST_CHROME_MULTI_CHROME_FRAME_READY_MODE =
+        ProductBits::CHROME_APP_HOST | ProductBits::CHROME_MULTI |
+        ProductBits::CHROME_FRAME_READY_MODE,
   };
 
   // Validates |machine_state| at user or system level, returning true if valid.
@@ -137,6 +155,24 @@ class InstallationValidator {
         const ProductState& product_state) const OVERRIDE;
   };
 
+  // Validation rules for Chrome App Host.
+  class ChromeAppHostRules : public ProductRules {
+   public:
+    virtual BrowserDistribution::Type distribution_type() const OVERRIDE;
+    virtual void AddUninstallSwitchExpectations(
+        const InstallationState& machine_state,
+        bool system_install,
+        const ProductState& product_state,
+        SwitchExpectations* expectations) const OVERRIDE;
+    virtual void AddRenameSwitchExpectations(
+        const InstallationState& machine_state,
+        bool system_install,
+        const ProductState& product_state,
+        SwitchExpectations* expectations) const OVERRIDE;
+    virtual bool UsageStatsAllowed(
+        const ProductState& product_state) const OVERRIDE;
+  };
+
   // Validation rules for the multi-install Chrome binaries.
   class ChromeBinariesRules : public ProductRules {
    public: