Split to SafeBrowsingDatabaseManager into Local* and Remote*.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index dc3be24971f03abb511ab2d268602524f52e5b5f..e4fc799cf74587eebcd12ce6662b4928eaa20307 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -371,11 +371,11 @@
       'configuration_policy%': 1,
 
       # Variable safe_browsing is used to control the build time configuration
-      # for safe browsing feature. Safe browsing can be compiled in 3 different
+      # for safe browsing feature. Safe browsing can be compiled in 4 different
       # levels: 0 disables it, 1 enables it fully, and 2 enables only UI and
-      # reporting features without enabling phishing and malware detection. This
-      # is useful to integrate a third party phishing/malware detection to
-      # existing safe browsing logic.
+      # reporting features for use with Data Saver on Mobile, and 3 enables
+      # extended mobile protection via an external API.  When 3 is fully
+      # deployed, it will replace 2.
       'safe_browsing%': 1,
 
       # Web speech is enabled by default. Set to 0 to disable.
@@ -3015,8 +3015,8 @@
       # SAFE_BROWSING_DB_REMOTE - service talks via API to a database
       # SAFE_BROWSING_CSD - enable client-side phishing detection.
       ['safe_browsing==1', {
-        # TODO(nparker): Remove existing uses of FULL_SAFE_BROWSING
         'defines': [
+          # TODO(nparker): Remove existing uses of FULL_SAFE_BROWSING
           'FULL_SAFE_BROWSING',
           'SAFE_BROWSING_CSD',
           'SAFE_BROWSING_DB_LOCAL',
@@ -3030,6 +3030,14 @@
           'SAFE_BROWSING_SERVICE',
         ],
       }],
+      ['safe_browsing==3', {
+        'defines': [
+          # TODO(nparker): Remove existing uses of MOBILE_SAFE_BROWSING
+          'MOBILE_SAFE_BROWSING',
+          'SAFE_BROWSING_DB_REMOTE',
+          'SAFE_BROWSING_SERVICE',
+        ],
+      }],
     ],  # conditions for 'target_defaults'
     'target_conditions': [
       ['<(use_libpci)==1', {