Compile specific parts of the Android build with -O2.

cc/cc.gyp

Index: cc/cc.gyp
diff --git a/cc/cc.gyp b/cc/cc.gyp
index af640a20ed276d1d681557b2409469087b70ffce..81358fb78cf3b94477a9be0818f478ac26c3c825 100644
--- a/cc/cc.gyp
+++ b/cc/cc.gyp
@@ -497,6 +497,9 @@
         'trees/tree_synchronizer.cc',
         'trees/tree_synchronizer.h',
       ],
+      'includes': [
+        '../build/android/increase_size_for_speed.gypi',
+      ],
       # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
     },
@@ -537,6 +540,9 @@
         'surfaces/surface_resource_holder.h',
         'surfaces/surfaces_export.h',
       ],
+      'includes': [
+        '../build/android/increase_size_for_speed.gypi',
+      ],
     },
   ],
 }