Remove EPM:all_hosts_ and use all_extension_views_ instead.

chrome/browser/extensions/platform_app_browsertest.cc

Index: chrome/browser/extensions/platform_app_browsertest.cc
diff --git a/chrome/browser/extensions/platform_app_browsertest.cc b/chrome/browser/extensions/platform_app_browsertest.cc
index 4a2b48fbd844c995a6b4bcd2ef4a45f13c0042da..055a3101515bd4ac4a844efd63ec9a09bd82cdb8 100644
--- a/chrome/browser/extensions/platform_app_browsertest.cc
+++ b/chrome/browser/extensions/platform_app_browsertest.cc
@@ -82,18 +82,9 @@ class PlatformAppBrowserTest : public ExtensionApiTest {
 
   // Gets the number of platform apps that are running.
   size_t GetPlatformAppCount() {
-    int count = 0;
     ExtensionProcessManager* process_manager =
         browser()->profile()->GetExtensionProcessManager();
-    ExtensionProcessManager::const_iterator iter;
-    for (iter = process_manager->begin(); iter != process_manager->end();
-         ++iter) {
-      ExtensionHost* host = *iter;
-      if (host->extension() && host->extension()->is_platform_app())
-        count++;
-    }
-
-    return count;
+    return process_manager->platform_app_hosts().size();
   }
 
   // Gets the WebContents associated with the ExtensionHost of the first
@@ -103,11 +94,11 @@ class PlatformAppBrowserTest : public ExtensionApiTest {
     ExtensionProcessManager* process_manager =
         browser()->profile()->GetExtensionProcessManager();
     ExtensionProcessManager::const_iterator iter;
-    for (iter = process_manager->begin(); iter != process_manager->end();
+    ExtensionProcessManager::ExtensionHostSet platform_app_hosts =
+        process_manager->platform_app_hosts();
+    for (iter = platform_app_hosts.begin(); iter != platform_app_hosts.end();
          ++iter) {
-      ExtensionHost* host = *iter;
-      if (host->extension() && host->extension()->is_platform_app())
-        return host->host_contents();
+      return (*iter)->host_contents();
     }
 
     return NULL;